Image Quizzes

Given clinical and imaging outcomes, as well as results on IHC assay, this patient is diagnosed with triple-negative breast cancer and is referred for further consultation with a multidisciplinary care team.

Triple-negative breast cancer accounts for 15% of all female breast cancer cases. The term "triple-negative" refers to the absence of estrogen receptor (ER) and progesterone receptor (PR) targets and the HER2 target for treatment. Otherwise, triple-negative breast cancer is highly heterogeneous and includes multiple molecular subtypes. Typically, triple-negative breast cancer occurs in younger patients, has a higher grade, a greater tumor size, a higher clinical stage at diagnosis, and a poorer prognosis than non–triple-negative breast cancers.

Biopsy samples from patients with a new primary or newly metastatic breast cancer diagnosis should undergo HR testing, both ER and PR, as well as HER2 receptor testing. Results of ER and PR testing are negative if a validated IHC assay shows 0% to < 1% of nuclei stain, according to the latest American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) HR testing guideline. HER2 results are negative if a validated IHC assay shows weak to moderate complete membrane staining in < 10% of tumor cells, according to ASCO/CAP guidelines. If HER2 results of a primary tumor are negative and specific clinical criteria suggest further testing, the oncologist may choose to order another IHC assay or a validated dual probe in situ hybridization (ISH) assay to aid in clinical decision-making.

Pathologic classification of triple-negative breast cancers includes multiple subgroups determined by therapeutic possibilities: low-risk histologic types (salivary gland–like carcinomas, fibromatosis-like carcinoma, low-grade adenosquamous breast carcinoma), immune activation (tumor-infiltrating lymphocytes, CD8, programmed death–ligand 1, tumor mutational burden), HER2-low status (IHC score 1+/2+ nonamplified), associated germline BRCA mutations, and other targets (trophoblast cell-surface antigen 2, HER3). 

Family history is the most common risk factor for developing breast cancer. If a person's mother or sister had breast cancer, the lifetime risk for that individual is four times greater than that of the general population. Risk for breast cancer grows even more if two or more first-degree relatives are diagnosed, or if one first-degree relative was diagnosed with breast cancer at ≤ 50 years of age. About 25% of triple-negative breast cancer cases have accompanying germline BRCA mutations. A recent study by Ahearn and colleagues found that 85 variants were linked to one or more tumor feature of ER-negative disease, and 32 of those variants were associated with triple-negative disease.

For a breast cancer diagnosis, the National Comprehensive Cancer Network recommends multidisciplinary care as well as the development of a personalized survivorship treatment plan, which includes a customized summary of possible long-term treatment toxicities. In addition, multidisciplinary care coordination encourages close follow-up that helps patients adhere to their medications and stay current with ongoing screening.

Because triple-negative breast cancer lacks HR and HER2 therapeutic targets, it can be difficult to treat. Standard therapy for high-risk triple-negative tumors includes chemotherapy with taxanes (paclitaxel or docetaxel) plus anthracycline-based treatment (cyclophosphamide plus doxorubicin). Neoadjuvant chemotherapy is recommended for patients with stage 2 and 3 tumors to reduce locoregional surgical extension and to allow for personalized treatment based on pathologic response. In 2018, two poly ADP ribose polymerase inhibitors, olaparib and talazoparib, were approved for use in select patients with triple-negative breast cancer, significantly changing the treatment paradigm for this disease. Other promising treatments have emerged recently in clinical trials for triple-negative disease, including immune checkpoint inhibitors, PI3K/AKT pathway inhibitors, and cytotoxin-conjugated antibodies.

Daniel S. Schwartz, MD, is Medical Director of Thoracic Oncology, St. Catherine of Siena Medical Center, Catholic Health Services, Smithtown, New York.

Dr. Schwartz serve(d) as a member of the following medical societies:
American College of Chest Physicians, American College of Surgeons, Society of Thoracic Surgeons, Western Thoracic Surgical Association.

Disclosure: Daniel S. Schwartz, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.
 

Given clinical and imaging outcomes, as well as results on IHC assay, this patient is diagnosed with triple-negative breast cancer and is referred for further consultation with a multidisciplinary care team.

Triple-negative breast cancer accounts for 15% of all female breast cancer cases. The term "triple-negative" refers to the absence of estrogen receptor (ER) and progesterone receptor (PR) targets and the HER2 target for treatment. Otherwise, triple-negative breast cancer is highly heterogeneous and includes multiple molecular subtypes. Typically, triple-negative breast cancer occurs in younger patients, has a higher grade, a greater tumor size, a higher clinical stage at diagnosis, and a poorer prognosis than non–triple-negative breast cancers.

Biopsy samples from patients with a new primary or newly metastatic breast cancer diagnosis should undergo HR testing, both ER and PR, as well as HER2 receptor testing. Results of ER and PR testing are negative if a validated IHC assay shows 0% to < 1% of nuclei stain, according to the latest American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) HR testing guideline. HER2 results are negative if a validated IHC assay shows weak to moderate complete membrane staining in < 10% of tumor cells, according to ASCO/CAP guidelines. If HER2 results of a primary tumor are negative and specific clinical criteria suggest further testing, the oncologist may choose to order another IHC assay or a validated dual probe in situ hybridization (ISH) assay to aid in clinical decision-making.

Pathologic classification of triple-negative breast cancers includes multiple subgroups determined by therapeutic possibilities: low-risk histologic types (salivary gland–like carcinomas, fibromatosis-like carcinoma, low-grade adenosquamous breast carcinoma), immune activation (tumor-infiltrating lymphocytes, CD8, programmed death–ligand 1, tumor mutational burden), HER2-low status (IHC score 1+/2+ nonamplified), associated germline BRCA mutations, and other targets (trophoblast cell-surface antigen 2, HER3). 

Family history is the most common risk factor for developing breast cancer. If a person's mother or sister had breast cancer, the lifetime risk for that individual is four times greater than that of the general population. Risk for breast cancer grows even more if two or more first-degree relatives are diagnosed, or if one first-degree relative was diagnosed with breast cancer at ≤ 50 years of age. About 25% of triple-negative breast cancer cases have accompanying germline BRCA mutations. A recent study by Ahearn and colleagues found that 85 variants were linked to one or more tumor feature of ER-negative disease, and 32 of those variants were associated with triple-negative disease.

For a breast cancer diagnosis, the National Comprehensive Cancer Network recommends multidisciplinary care as well as the development of a personalized survivorship treatment plan, which includes a customized summary of possible long-term treatment toxicities. In addition, multidisciplinary care coordination encourages close follow-up that helps patients adhere to their medications and stay current with ongoing screening.

Because triple-negative breast cancer lacks HR and HER2 therapeutic targets, it can be difficult to treat. Standard therapy for high-risk triple-negative tumors includes chemotherapy with taxanes (paclitaxel or docetaxel) plus anthracycline-based treatment (cyclophosphamide plus doxorubicin). Neoadjuvant chemotherapy is recommended for patients with stage 2 and 3 tumors to reduce locoregional surgical extension and to allow for personalized treatment based on pathologic response. In 2018, two poly ADP ribose polymerase inhibitors, olaparib and talazoparib, were approved for use in select patients with triple-negative breast cancer, significantly changing the treatment paradigm for this disease. Other promising treatments have emerged recently in clinical trials for triple-negative disease, including immune checkpoint inhibitors, PI3K/AKT pathway inhibitors, and cytotoxin-conjugated antibodies.

Daniel S. Schwartz, MD, is Medical Director of Thoracic Oncology, St. Catherine of Siena Medical Center, Catholic Health Services, Smithtown, New York.

Dr. Schwartz serve(d) as a member of the following medical societies:
American College of Chest Physicians, American College of Surgeons, Society of Thoracic Surgeons, Western Thoracic Surgical Association.

Disclosure: Daniel S. Schwartz, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.
 

Given clinical and imaging outcomes, as well as results on IHC assay, this patient is diagnosed with triple-negative breast cancer and is referred for further consultation with a multidisciplinary care team.

Triple-negative breast cancer accounts for 15% of all female breast cancer cases. The term "triple-negative" refers to the absence of estrogen receptor (ER) and progesterone receptor (PR) targets and the HER2 target for treatment. Otherwise, triple-negative breast cancer is highly heterogeneous and includes multiple molecular subtypes. Typically, triple-negative breast cancer occurs in younger patients, has a higher grade, a greater tumor size, a higher clinical stage at diagnosis, and a poorer prognosis than non–triple-negative breast cancers.

Biopsy samples from patients with a new primary or newly metastatic breast cancer diagnosis should undergo HR testing, both ER and PR, as well as HER2 receptor testing. Results of ER and PR testing are negative if a validated IHC assay shows 0% to < 1% of nuclei stain, according to the latest American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) HR testing guideline. HER2 results are negative if a validated IHC assay shows weak to moderate complete membrane staining in < 10% of tumor cells, according to ASCO/CAP guidelines. If HER2 results of a primary tumor are negative and specific clinical criteria suggest further testing, the oncologist may choose to order another IHC assay or a validated dual probe in situ hybridization (ISH) assay to aid in clinical decision-making.

Pathologic classification of triple-negative breast cancers includes multiple subgroups determined by therapeutic possibilities: low-risk histologic types (salivary gland–like carcinomas, fibromatosis-like carcinoma, low-grade adenosquamous breast carcinoma), immune activation (tumor-infiltrating lymphocytes, CD8, programmed death–ligand 1, tumor mutational burden), HER2-low status (IHC score 1+/2+ nonamplified), associated germline BRCA mutations, and other targets (trophoblast cell-surface antigen 2, HER3). 

Family history is the most common risk factor for developing breast cancer. If a person's mother or sister had breast cancer, the lifetime risk for that individual is four times greater than that of the general population. Risk for breast cancer grows even more if two or more first-degree relatives are diagnosed, or if one first-degree relative was diagnosed with breast cancer at ≤ 50 years of age. About 25% of triple-negative breast cancer cases have accompanying germline BRCA mutations. A recent study by Ahearn and colleagues found that 85 variants were linked to one or more tumor feature of ER-negative disease, and 32 of those variants were associated with triple-negative disease.

For a breast cancer diagnosis, the National Comprehensive Cancer Network recommends multidisciplinary care as well as the development of a personalized survivorship treatment plan, which includes a customized summary of possible long-term treatment toxicities. In addition, multidisciplinary care coordination encourages close follow-up that helps patients adhere to their medications and stay current with ongoing screening.

Because triple-negative breast cancer lacks HR and HER2 therapeutic targets, it can be difficult to treat. Standard therapy for high-risk triple-negative tumors includes chemotherapy with taxanes (paclitaxel or docetaxel) plus anthracycline-based treatment (cyclophosphamide plus doxorubicin). Neoadjuvant chemotherapy is recommended for patients with stage 2 and 3 tumors to reduce locoregional surgical extension and to allow for personalized treatment based on pathologic response. In 2018, two poly ADP ribose polymerase inhibitors, olaparib and talazoparib, were approved for use in select patients with triple-negative breast cancer, significantly changing the treatment paradigm for this disease. Other promising treatments have emerged recently in clinical trials for triple-negative disease, including immune checkpoint inhibitors, PI3K/AKT pathway inhibitors, and cytotoxin-conjugated antibodies.

Daniel S. Schwartz, MD, is Medical Director of Thoracic Oncology, St. Catherine of Siena Medical Center, Catholic Health Services, Smithtown, New York.

Dr. Schwartz serve(d) as a member of the following medical societies:
American College of Chest Physicians, American College of Surgeons, Society of Thoracic Surgeons, Western Thoracic Surgical Association.

Disclosure: Daniel S. Schwartz, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.
 

In a lifelong smoker, a tumor in the periphery of the lung and histology showing glandular cells with some neuroendocrine differentiation is most likely large cell carcinoma, a type of non–small cell lung cancer (NSCLC). Although small cell lung cancer is also associated with smoking, histology typically demonstrates highly cellular aspirates with small blue cells with very scant or null cytoplasm, loosely arranged or in a syncytial pattern. Bronchial adenoma is unlikely, given the patient's unintentional weight loss and fatigue over the past few months. Mesothelioma is most associated with asbestos exposure and is found in the lung pleura, which typically presents with pleural effusion.

Lung cancer is the top cause of cancer deaths in the US, second only to prostate cancer in men and breast cancer in women; approximately 85% of all lung cancers are classified as NSCLC. Histologically, NSCLC is further categorized into adenocarcinoma, squamous cell carcinoma, and large cell carcinoma (LCC). When a patient presents with intrathoracic symptoms (including cough, chest pain, wheezing, or dyspnea) and a pulmonary nodule on chest radiography, NSCLC is typically suspected as a possible diagnosis. Smoking is the most common cause of this lung cancer (78% in men, 90% in women). 

Several methods confirm the diagnosis of NSCLC, including bronchoscopy, sputum cytology, mediastinoscopy, thoracentesis, thoracoscopy, and transthoracic needle biopsy. Which method is chosen depends on the primary lesion location and accessibility. Histologic evaluation helps differentiate between the various subtypes of NSCLC. LCC is a subset of NSCLC that is a diagnosis of exclusion. Histologically, LCC is poorly differentiated, and 90% of cases will show squamous, glandular, or neuroendocrine differentiation.

When first diagnosed with NSCLC, 20% of patients have cancer confined to a specific area, 25% of patients have cancer that has spread to nearby areas, and 55% of patients have cancer that has spread to distant body parts. The specific symptoms experienced by patients will vary depending on the location of the cancer. The prognosis for NSCLC depends on the staging of the tumor, nodes, and metastases, the patient's performance status, and any existing health conditions. In the US, the 5-year relative survival rate is 61.2% for localized disease, 33.5% for regional disease, and 7.0% for disease with distant metastases. 

Treatment of NSCLC also varies according to the patient's functional status, tumor stage, molecular characteristics, and comorbidities. Generally, patients with stage I, II, or III NSCLC are treated with the intent to cure, which can include surgery, chemotherapy, radiation therapy, or a combined approach. Lobectomy or resection is generally accepted as an approach for surgical intervention on early-stage NSCLC; however, for stages higher than IB (including stage II/III), patients are recommended to undergo adjuvant chemotherapy. Patients with stage IV disease (or recurrence after initial management) are typically treated with systemic therapy or should be considered for palliative treatment to improve quality of life and overall survival.
 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

In a lifelong smoker, a tumor in the periphery of the lung and histology showing glandular cells with some neuroendocrine differentiation is most likely large cell carcinoma, a type of non–small cell lung cancer (NSCLC). Although small cell lung cancer is also associated with smoking, histology typically demonstrates highly cellular aspirates with small blue cells with very scant or null cytoplasm, loosely arranged or in a syncytial pattern. Bronchial adenoma is unlikely, given the patient's unintentional weight loss and fatigue over the past few months. Mesothelioma is most associated with asbestos exposure and is found in the lung pleura, which typically presents with pleural effusion.

Lung cancer is the top cause of cancer deaths in the US, second only to prostate cancer in men and breast cancer in women; approximately 85% of all lung cancers are classified as NSCLC. Histologically, NSCLC is further categorized into adenocarcinoma, squamous cell carcinoma, and large cell carcinoma (LCC). When a patient presents with intrathoracic symptoms (including cough, chest pain, wheezing, or dyspnea) and a pulmonary nodule on chest radiography, NSCLC is typically suspected as a possible diagnosis. Smoking is the most common cause of this lung cancer (78% in men, 90% in women). 

Several methods confirm the diagnosis of NSCLC, including bronchoscopy, sputum cytology, mediastinoscopy, thoracentesis, thoracoscopy, and transthoracic needle biopsy. Which method is chosen depends on the primary lesion location and accessibility. Histologic evaluation helps differentiate between the various subtypes of NSCLC. LCC is a subset of NSCLC that is a diagnosis of exclusion. Histologically, LCC is poorly differentiated, and 90% of cases will show squamous, glandular, or neuroendocrine differentiation.

When first diagnosed with NSCLC, 20% of patients have cancer confined to a specific area, 25% of patients have cancer that has spread to nearby areas, and 55% of patients have cancer that has spread to distant body parts. The specific symptoms experienced by patients will vary depending on the location of the cancer. The prognosis for NSCLC depends on the staging of the tumor, nodes, and metastases, the patient's performance status, and any existing health conditions. In the US, the 5-year relative survival rate is 61.2% for localized disease, 33.5% for regional disease, and 7.0% for disease with distant metastases. 

Treatment of NSCLC also varies according to the patient's functional status, tumor stage, molecular characteristics, and comorbidities. Generally, patients with stage I, II, or III NSCLC are treated with the intent to cure, which can include surgery, chemotherapy, radiation therapy, or a combined approach. Lobectomy or resection is generally accepted as an approach for surgical intervention on early-stage NSCLC; however, for stages higher than IB (including stage II/III), patients are recommended to undergo adjuvant chemotherapy. Patients with stage IV disease (or recurrence after initial management) are typically treated with systemic therapy or should be considered for palliative treatment to improve quality of life and overall survival.
 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

In a lifelong smoker, a tumor in the periphery of the lung and histology showing glandular cells with some neuroendocrine differentiation is most likely large cell carcinoma, a type of non–small cell lung cancer (NSCLC). Although small cell lung cancer is also associated with smoking, histology typically demonstrates highly cellular aspirates with small blue cells with very scant or null cytoplasm, loosely arranged or in a syncytial pattern. Bronchial adenoma is unlikely, given the patient's unintentional weight loss and fatigue over the past few months. Mesothelioma is most associated with asbestos exposure and is found in the lung pleura, which typically presents with pleural effusion.

Lung cancer is the top cause of cancer deaths in the US, second only to prostate cancer in men and breast cancer in women; approximately 85% of all lung cancers are classified as NSCLC. Histologically, NSCLC is further categorized into adenocarcinoma, squamous cell carcinoma, and large cell carcinoma (LCC). When a patient presents with intrathoracic symptoms (including cough, chest pain, wheezing, or dyspnea) and a pulmonary nodule on chest radiography, NSCLC is typically suspected as a possible diagnosis. Smoking is the most common cause of this lung cancer (78% in men, 90% in women). 

Several methods confirm the diagnosis of NSCLC, including bronchoscopy, sputum cytology, mediastinoscopy, thoracentesis, thoracoscopy, and transthoracic needle biopsy. Which method is chosen depends on the primary lesion location and accessibility. Histologic evaluation helps differentiate between the various subtypes of NSCLC. LCC is a subset of NSCLC that is a diagnosis of exclusion. Histologically, LCC is poorly differentiated, and 90% of cases will show squamous, glandular, or neuroendocrine differentiation.

When first diagnosed with NSCLC, 20% of patients have cancer confined to a specific area, 25% of patients have cancer that has spread to nearby areas, and 55% of patients have cancer that has spread to distant body parts. The specific symptoms experienced by patients will vary depending on the location of the cancer. The prognosis for NSCLC depends on the staging of the tumor, nodes, and metastases, the patient's performance status, and any existing health conditions. In the US, the 5-year relative survival rate is 61.2% for localized disease, 33.5% for regional disease, and 7.0% for disease with distant metastases. 

Treatment of NSCLC also varies according to the patient's functional status, tumor stage, molecular characteristics, and comorbidities. Generally, patients with stage I, II, or III NSCLC are treated with the intent to cure, which can include surgery, chemotherapy, radiation therapy, or a combined approach. Lobectomy or resection is generally accepted as an approach for surgical intervention on early-stage NSCLC; however, for stages higher than IB (including stage II/III), patients are recommended to undergo adjuvant chemotherapy. Patients with stage IV disease (or recurrence after initial management) are typically treated with systemic therapy or should be considered for palliative treatment to improve quality of life and overall survival.
 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Given the patient's results on the genetic panel and MRI, as well as the noted cognitive decline and increased aggression, this patient is suspected of having limbic-predominant age-related TDP-43 encephalopathy (LATE) secondary to AD and is referred to the neurologist on her multidisciplinary care team for further consultation and testing.

AD is one of the most common forms of dementia. More than 6 million people in the United States have clinical AD or mild cognitive impairment because of AD. LATE is a new classification of dementia, identified in 2019, that mimics AD but is a unique disease entity driven by the misfolding of the protein TDP-43, which regulates gene expression in the brain. Misfolded TDP-43 protein is common among older adults aged ≥ 85 years, and about a quarter of this population has enough misfolded TDP-43 protein to affect their memory and cognition. 

Diagnosing AD currently relies on a clinical approach. A complete physical examination, with a detailed neurologic examination and a mental status examination, is used to evaluate disease stage. Initial mental status testing evaluates attention and concentration, recent and remote memory, language, praxis, executive function, and visuospatial function. Because LATE is a newly discovered form of dementia, there are no set guidelines on diagnosing LATE and no robust biomarker for TDP-43. What is known about LATE has been gleaned mostly from retrospective clinicopathologic studies. 

The LATE consensus working group reports that the clinical course of disease, as studied by autopsy-proven LATE neuropathologic change (LATE-NC), is described as an "amnestic cognitive syndrome that can evolve to incorporate multiple cognitive domains and ultimately to impair activities of daily living." Researchers are currently analyzing different clinical assessments and neuroimaging with MRI to characterize LATE. A group of international researchers recently published a set of clinical criteria for limbic-predominant amnestic neurodegenerative syndrome (LANS), which is associated with LATE-NC. Their criteria include "core, standard and advanced features that are measurable in vivo, including older age at evaluation, mild clinical syndrome, disproportionate hippocampal atrophy, impaired semantic memory, limbic hypometabolism, absence of neocortical degenerative patterns and low likelihood of neocortical tau, with degrees of certainty (highest, high, moderate, low)." Other neuroimaging studies of autopsy-confirmed LATE-NC have shown that atrophy is mostly focused in the medial temporal lobe with marked reduced hippocampal volume.

The group reports that LATE and AD probably share pathophysiologic mechanisms. One of the universally accepted hallmarks of AD is the formation of beta-amyloid plaques, which are dense, mostly insoluble deposits of beta-amyloid protein that develop around neurons in the hippocampus and other regions in the cerebral cortex used for decision-making. These plaques disrupt brain function and lead to brain atrophy. The LATE group also reports that this same pathology has been noted with LATE: "Many subjects with LATE-NC have comorbid brain pathologies, often including amyloid-beta plaques and tauopathy." That said, genetic studies have helped identify five genes with risk alleles for LATE (GRN, TMEM106B, ABCC9, KCNMB2, and APOE), suggesting disease-specific underlying mechanisms compared to AD. 

Patient and caregiver education and guidance is vital with a dementia diagnosis. If LATE and/or AD are suspected, physicians should encourage the involvement of family and friends who agree to become more involved in the patient's care as the disease progresses. These individuals need to understand the patient's wishes around care, especially for the future when the patient is no longer able to make decisions. The patient may also consider establishing medical advance directives and durable power of attorney for medical and financial decision-making. Caregivers supporting the patient are encouraged to help balance the physical needs of the patient while maintaining respect for them as a competent adult to the extent allowed by the progression of their disease. 

Because LATE is a new classification of dementia, there are no known effective treatments. One ongoing study is testing the use of autologous bone marrow–derived stem cells to help improve cognitive impairment among patients with LATE, AD, and other dementias. Current AD treatments are focused on symptomatic therapies that modulate neurotransmitters — either acetylcholine or glutamate. The standard medical treatment includes cholinesterase inhibitors and a partial N-methyl-D-aspartate antagonist. Two amyloid-directed antibodies (aducanumab, lecanemab) are currently available in the United States for individuals with AD exhibiting mild cognitive impairment or mild dementia. A third agent currently in clinical trials (donanemab) has shown significantly slowed clinical progression after 1.5 years among clinical trial participants with early symptomatic AD and amyloid and tau pathology.

Shaheen E. Lakhan, MD, PhD, MS, MEd, Chief of Pain Management, Carilion Clinic and Virginia Tech Carilion School of Medicine, Roanoke, Virginia.

Disclosure: Shaheen E. Lakhan, MD, PhD, MS, MEd, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Given the patient's results on the genetic panel and MRI, as well as the noted cognitive decline and increased aggression, this patient is suspected of having limbic-predominant age-related TDP-43 encephalopathy (LATE) secondary to AD and is referred to the neurologist on her multidisciplinary care team for further consultation and testing.

AD is one of the most common forms of dementia. More than 6 million people in the United States have clinical AD or mild cognitive impairment because of AD. LATE is a new classification of dementia, identified in 2019, that mimics AD but is a unique disease entity driven by the misfolding of the protein TDP-43, which regulates gene expression in the brain. Misfolded TDP-43 protein is common among older adults aged ≥ 85 years, and about a quarter of this population has enough misfolded TDP-43 protein to affect their memory and cognition. 

Diagnosing AD currently relies on a clinical approach. A complete physical examination, with a detailed neurologic examination and a mental status examination, is used to evaluate disease stage. Initial mental status testing evaluates attention and concentration, recent and remote memory, language, praxis, executive function, and visuospatial function. Because LATE is a newly discovered form of dementia, there are no set guidelines on diagnosing LATE and no robust biomarker for TDP-43. What is known about LATE has been gleaned mostly from retrospective clinicopathologic studies. 

The LATE consensus working group reports that the clinical course of disease, as studied by autopsy-proven LATE neuropathologic change (LATE-NC), is described as an "amnestic cognitive syndrome that can evolve to incorporate multiple cognitive domains and ultimately to impair activities of daily living." Researchers are currently analyzing different clinical assessments and neuroimaging with MRI to characterize LATE. A group of international researchers recently published a set of clinical criteria for limbic-predominant amnestic neurodegenerative syndrome (LANS), which is associated with LATE-NC. Their criteria include "core, standard and advanced features that are measurable in vivo, including older age at evaluation, mild clinical syndrome, disproportionate hippocampal atrophy, impaired semantic memory, limbic hypometabolism, absence of neocortical degenerative patterns and low likelihood of neocortical tau, with degrees of certainty (highest, high, moderate, low)." Other neuroimaging studies of autopsy-confirmed LATE-NC have shown that atrophy is mostly focused in the medial temporal lobe with marked reduced hippocampal volume.

The group reports that LATE and AD probably share pathophysiologic mechanisms. One of the universally accepted hallmarks of AD is the formation of beta-amyloid plaques, which are dense, mostly insoluble deposits of beta-amyloid protein that develop around neurons in the hippocampus and other regions in the cerebral cortex used for decision-making. These plaques disrupt brain function and lead to brain atrophy. The LATE group also reports that this same pathology has been noted with LATE: "Many subjects with LATE-NC have comorbid brain pathologies, often including amyloid-beta plaques and tauopathy." That said, genetic studies have helped identify five genes with risk alleles for LATE (GRN, TMEM106B, ABCC9, KCNMB2, and APOE), suggesting disease-specific underlying mechanisms compared to AD. 

Patient and caregiver education and guidance is vital with a dementia diagnosis. If LATE and/or AD are suspected, physicians should encourage the involvement of family and friends who agree to become more involved in the patient's care as the disease progresses. These individuals need to understand the patient's wishes around care, especially for the future when the patient is no longer able to make decisions. The patient may also consider establishing medical advance directives and durable power of attorney for medical and financial decision-making. Caregivers supporting the patient are encouraged to help balance the physical needs of the patient while maintaining respect for them as a competent adult to the extent allowed by the progression of their disease. 

Because LATE is a new classification of dementia, there are no known effective treatments. One ongoing study is testing the use of autologous bone marrow–derived stem cells to help improve cognitive impairment among patients with LATE, AD, and other dementias. Current AD treatments are focused on symptomatic therapies that modulate neurotransmitters — either acetylcholine or glutamate. The standard medical treatment includes cholinesterase inhibitors and a partial N-methyl-D-aspartate antagonist. Two amyloid-directed antibodies (aducanumab, lecanemab) are currently available in the United States for individuals with AD exhibiting mild cognitive impairment or mild dementia. A third agent currently in clinical trials (donanemab) has shown significantly slowed clinical progression after 1.5 years among clinical trial participants with early symptomatic AD and amyloid and tau pathology.

Shaheen E. Lakhan, MD, PhD, MS, MEd, Chief of Pain Management, Carilion Clinic and Virginia Tech Carilion School of Medicine, Roanoke, Virginia.

Disclosure: Shaheen E. Lakhan, MD, PhD, MS, MEd, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Given the patient's results on the genetic panel and MRI, as well as the noted cognitive decline and increased aggression, this patient is suspected of having limbic-predominant age-related TDP-43 encephalopathy (LATE) secondary to AD and is referred to the neurologist on her multidisciplinary care team for further consultation and testing.

AD is one of the most common forms of dementia. More than 6 million people in the United States have clinical AD or mild cognitive impairment because of AD. LATE is a new classification of dementia, identified in 2019, that mimics AD but is a unique disease entity driven by the misfolding of the protein TDP-43, which regulates gene expression in the brain. Misfolded TDP-43 protein is common among older adults aged ≥ 85 years, and about a quarter of this population has enough misfolded TDP-43 protein to affect their memory and cognition. 

Diagnosing AD currently relies on a clinical approach. A complete physical examination, with a detailed neurologic examination and a mental status examination, is used to evaluate disease stage. Initial mental status testing evaluates attention and concentration, recent and remote memory, language, praxis, executive function, and visuospatial function. Because LATE is a newly discovered form of dementia, there are no set guidelines on diagnosing LATE and no robust biomarker for TDP-43. What is known about LATE has been gleaned mostly from retrospective clinicopathologic studies. 

The LATE consensus working group reports that the clinical course of disease, as studied by autopsy-proven LATE neuropathologic change (LATE-NC), is described as an "amnestic cognitive syndrome that can evolve to incorporate multiple cognitive domains and ultimately to impair activities of daily living." Researchers are currently analyzing different clinical assessments and neuroimaging with MRI to characterize LATE. A group of international researchers recently published a set of clinical criteria for limbic-predominant amnestic neurodegenerative syndrome (LANS), which is associated with LATE-NC. Their criteria include "core, standard and advanced features that are measurable in vivo, including older age at evaluation, mild clinical syndrome, disproportionate hippocampal atrophy, impaired semantic memory, limbic hypometabolism, absence of neocortical degenerative patterns and low likelihood of neocortical tau, with degrees of certainty (highest, high, moderate, low)." Other neuroimaging studies of autopsy-confirmed LATE-NC have shown that atrophy is mostly focused in the medial temporal lobe with marked reduced hippocampal volume.

The group reports that LATE and AD probably share pathophysiologic mechanisms. One of the universally accepted hallmarks of AD is the formation of beta-amyloid plaques, which are dense, mostly insoluble deposits of beta-amyloid protein that develop around neurons in the hippocampus and other regions in the cerebral cortex used for decision-making. These plaques disrupt brain function and lead to brain atrophy. The LATE group also reports that this same pathology has been noted with LATE: "Many subjects with LATE-NC have comorbid brain pathologies, often including amyloid-beta plaques and tauopathy." That said, genetic studies have helped identify five genes with risk alleles for LATE (GRN, TMEM106B, ABCC9, KCNMB2, and APOE), suggesting disease-specific underlying mechanisms compared to AD. 

Patient and caregiver education and guidance is vital with a dementia diagnosis. If LATE and/or AD are suspected, physicians should encourage the involvement of family and friends who agree to become more involved in the patient's care as the disease progresses. These individuals need to understand the patient's wishes around care, especially for the future when the patient is no longer able to make decisions. The patient may also consider establishing medical advance directives and durable power of attorney for medical and financial decision-making. Caregivers supporting the patient are encouraged to help balance the physical needs of the patient while maintaining respect for them as a competent adult to the extent allowed by the progression of their disease. 

Because LATE is a new classification of dementia, there are no known effective treatments. One ongoing study is testing the use of autologous bone marrow–derived stem cells to help improve cognitive impairment among patients with LATE, AD, and other dementias. Current AD treatments are focused on symptomatic therapies that modulate neurotransmitters — either acetylcholine or glutamate. The standard medical treatment includes cholinesterase inhibitors and a partial N-methyl-D-aspartate antagonist. Two amyloid-directed antibodies (aducanumab, lecanemab) are currently available in the United States for individuals with AD exhibiting mild cognitive impairment or mild dementia. A third agent currently in clinical trials (donanemab) has shown significantly slowed clinical progression after 1.5 years among clinical trial participants with early symptomatic AD and amyloid and tau pathology.

Shaheen E. Lakhan, MD, PhD, MS, MEd, Chief of Pain Management, Carilion Clinic and Virginia Tech Carilion School of Medicine, Roanoke, Virginia.

Disclosure: Shaheen E. Lakhan, MD, PhD, MS, MEd, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Migraine is one of the most common neurologic diseases, affecting about 14% of the population. Migraines may also be associated with auras or visual or sensory symptoms that precede the headache. However, approximately 4% of people with migraine experience their usual migraines and sometimes also experience episodes of an aura that is not followed by a headache. Silent migraines, also known as acephalgic migraines or "migraine auras without headache," typically cause symptoms that accompany the phases of a migraine, but without the classic headache pain. It is most common among young adults in their 20s and 30s and older adults between 40 and 60 years of age, especially in those who had auras accompanied by migraine headaches when younger. 

According to the International Headache Society, a migraine aura develops gradually over 5 to 10 minutes and lasts for less than 1 hour. Although the symptoms of a silent migraine may vary from person to person, visual symptoms occur in more than 90% of migraine auras. Visual symptoms may also be accompanied by other neurologic symptoms such as dizziness, numbness or tingling, and aphasia. The most common visual symptoms are positive symptoms, such as flash scotoma, visual distortion, colored spots, and flash hallucinations. Visual symptoms may easily be confused with symptoms of a transient ischemic attack (TIA). However, migraine auras generally last 15 to 30 minutes. They are often described as dynamic, bright, multicolored forms in geometric patterns. In contrast, the visual symptoms of a TIA last on average 3 to 10 minutes and are described as a static, dark dimming of vision. 

The diagnosis of migraine aura without headache should be made after all other possible causes have been excluded, particularly TIAs and focal seizures because of the diagnostic, therapeutic, and prognostic implications. Testing may include a neurologic and eye examination, MRI, CT angiography, and laboratory testing for clotting disorders. 

Migraine aura without headache is a benign condition and generally does not require treatment. When symptoms of silent migraines are severe enough, low-dose aspirin and calcium-channel blockers may be considered as treatment options. However, triptans, which are often used in patients with migraine headaches, should not be used to treat silent migraines because they do not act fast enough to affect an aura. In addition, triptans should be used with caution in older patients, who may have vascular disease, hypertension, and other cardiovascular risk factors. 
 

Jasmin Harpe, MD, MPH, Headache Fellow, Department of Neurology, Harvard University, John R. Graham Headache Center, Mass General Brigham, Boston, MA

Jasmin Harpe, MD, MPH, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Migraine is one of the most common neurologic diseases, affecting about 14% of the population. Migraines may also be associated with auras or visual or sensory symptoms that precede the headache. However, approximately 4% of people with migraine experience their usual migraines and sometimes also experience episodes of an aura that is not followed by a headache. Silent migraines, also known as acephalgic migraines or "migraine auras without headache," typically cause symptoms that accompany the phases of a migraine, but without the classic headache pain. It is most common among young adults in their 20s and 30s and older adults between 40 and 60 years of age, especially in those who had auras accompanied by migraine headaches when younger. 

According to the International Headache Society, a migraine aura develops gradually over 5 to 10 minutes and lasts for less than 1 hour. Although the symptoms of a silent migraine may vary from person to person, visual symptoms occur in more than 90% of migraine auras. Visual symptoms may also be accompanied by other neurologic symptoms such as dizziness, numbness or tingling, and aphasia. The most common visual symptoms are positive symptoms, such as flash scotoma, visual distortion, colored spots, and flash hallucinations. Visual symptoms may easily be confused with symptoms of a transient ischemic attack (TIA). However, migraine auras generally last 15 to 30 minutes. They are often described as dynamic, bright, multicolored forms in geometric patterns. In contrast, the visual symptoms of a TIA last on average 3 to 10 minutes and are described as a static, dark dimming of vision. 

The diagnosis of migraine aura without headache should be made after all other possible causes have been excluded, particularly TIAs and focal seizures because of the diagnostic, therapeutic, and prognostic implications. Testing may include a neurologic and eye examination, MRI, CT angiography, and laboratory testing for clotting disorders. 

Migraine aura without headache is a benign condition and generally does not require treatment. When symptoms of silent migraines are severe enough, low-dose aspirin and calcium-channel blockers may be considered as treatment options. However, triptans, which are often used in patients with migraine headaches, should not be used to treat silent migraines because they do not act fast enough to affect an aura. In addition, triptans should be used with caution in older patients, who may have vascular disease, hypertension, and other cardiovascular risk factors. 
 

Jasmin Harpe, MD, MPH, Headache Fellow, Department of Neurology, Harvard University, John R. Graham Headache Center, Mass General Brigham, Boston, MA

Jasmin Harpe, MD, MPH, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Migraine is one of the most common neurologic diseases, affecting about 14% of the population. Migraines may also be associated with auras or visual or sensory symptoms that precede the headache. However, approximately 4% of people with migraine experience their usual migraines and sometimes also experience episodes of an aura that is not followed by a headache. Silent migraines, also known as acephalgic migraines or "migraine auras without headache," typically cause symptoms that accompany the phases of a migraine, but without the classic headache pain. It is most common among young adults in their 20s and 30s and older adults between 40 and 60 years of age, especially in those who had auras accompanied by migraine headaches when younger. 

According to the International Headache Society, a migraine aura develops gradually over 5 to 10 minutes and lasts for less than 1 hour. Although the symptoms of a silent migraine may vary from person to person, visual symptoms occur in more than 90% of migraine auras. Visual symptoms may also be accompanied by other neurologic symptoms such as dizziness, numbness or tingling, and aphasia. The most common visual symptoms are positive symptoms, such as flash scotoma, visual distortion, colored spots, and flash hallucinations. Visual symptoms may easily be confused with symptoms of a transient ischemic attack (TIA). However, migraine auras generally last 15 to 30 minutes. They are often described as dynamic, bright, multicolored forms in geometric patterns. In contrast, the visual symptoms of a TIA last on average 3 to 10 minutes and are described as a static, dark dimming of vision. 

The diagnosis of migraine aura without headache should be made after all other possible causes have been excluded, particularly TIAs and focal seizures because of the diagnostic, therapeutic, and prognostic implications. Testing may include a neurologic and eye examination, MRI, CT angiography, and laboratory testing for clotting disorders. 

Migraine aura without headache is a benign condition and generally does not require treatment. When symptoms of silent migraines are severe enough, low-dose aspirin and calcium-channel blockers may be considered as treatment options. However, triptans, which are often used in patients with migraine headaches, should not be used to treat silent migraines because they do not act fast enough to affect an aura. In addition, triptans should be used with caution in older patients, who may have vascular disease, hypertension, and other cardiovascular risk factors. 
 

Jasmin Harpe, MD, MPH, Headache Fellow, Department of Neurology, Harvard University, John R. Graham Headache Center, Mass General Brigham, Boston, MA

Jasmin Harpe, MD, MPH, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Psoriatic arthritis (PsA) is consistent with the patient's joint pain, dactylitis, enthesitis, skin plaques, and radiographic findings, making it the most likely diagnosis. 

Rheumatoid arthritis (RA) is possible because of the patient's joint symptoms; however, it is not the correct answer because of negative RF and ACPA tests and skin plaques. 

Osteoarthritis might cause joint pain but does not typically present with prolonged morning stiffness, skin plaques, or the "pencil-in-cup" radiographic finding. 

Gout, an inflammatory arthritis, primarily affects the big toe and does not align with the patient's skin and radiographic manifestations. 

PsA is a chronic inflammatory arthritis that often develops in people with psoriasis. It affects roughly 0.05%- 0.25% of the general population and up to 41% of people with psoriasis. PsA is most seen in White patients between 35 and 55 years and affects both men and women equally. PsA is linked to a higher risk for obesity, hypertension, hyperlipidemia, type 2 diabetes, metabolic syndrome, and other conditions, including uveitis and inflammatory bowel disease.

Clinically, PsA presents with a diverse range of manifestations, encompassing peripheral joint inflammation, often with an asymmetric distribution; axial skeletal involvement reminiscent of spondylitis; dactylitis characterized by sausage-like swelling of fingers or toes; and enthesitis. Common symptoms or findings include early morning stiffness for > 30 minutes; joint pain, tenderness, and swelling; back pain aggravated by rest and relieved by exercise; limited joint motion; and deformity. Although most patients have a preceding condition in skin psoriasis, diagnosis of PsA is often delayed. Furthermore, nearly 80% of patients may exhibit nail changes, such as pitting or onycholysis, compared with about 40% of patients with psoriasis without arthritis. The heterogeneity of its clinical features often necessitates a comprehensive differential diagnosis to distinguish PsA from other spondyloarthropathies and rheumatic diseases. The most accepted classification criteria for PsA are the Classification of Psoriatic Arthritis (CASPAR) criteria, which have been used since 2006.

No laboratory tests are specific for PsA; however, a normal ESR and CRP level should not be used to rule out a diagnosis of PsA because these values are increased in only about 40% of patients. RF and ACPA are classically considered absent in PsA, and a negative RF is regarded as a criterion for diagnosing PsA per the CASPAR classification criteria. Radiographic changes show some characteristic patterns in PsA, including erosive damage, gross joint destruction, joint space narrowing, and "pencil-in-cup" deformity.

PsA treatment options have evolved over the years. Whereas in the past, nonsteroidal anti-inflammatory drugs, glucocorticoids, methotrexate, sulfasalazine, and cyclosporine were commonly prescribed, the development of immunologically targeted biological disease-modifying antirheumatic drugs (DMARDs) and targeted synthetic DMARDs since 2000 has revolutionized the treatment of PsA. Tumor necrosis factor inhibitors (ie, etanercept, infliximab, and adalimumab) have been shown to improve all domains (psoriatic and articular disease) of PsA and are considered a milestone in managing the condition. Other emerging therapeutic strategies in recent years have demonstrated efficacy in treating PsA, including monoclonal antibodies targeting interleukin (IL)-12, IL-23, and IL-17, as well as small-molecule phosphodiesterase 4 and Janus kinase inhibitors.

Although most of these options have the potential to be effective in all clinical domains of the disease, their cross-domain efficacy can vary from patient to patient. In some cases, treatment may not be practical or can lose effectiveness over time, and true disease remission is rare. As a result, clinicians must regularly assess each domain and aim to achieve remission or low disease activity across the different active domains while also being aware of potential adverse events.

Alan Irvine, MD, DSc, Consultant Dermatologist, ADI Dermatology LTD, Dublin, Ireland

Alan Irvine, MD, DSc, has disclosed the following relevant financial relationships:
Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.
Serve(d) as a speaker or member of a speakers bureau for: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.

Received income in an amount equal to or greater than $250 from: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.
 

Psoriatic arthritis (PsA) is consistent with the patient's joint pain, dactylitis, enthesitis, skin plaques, and radiographic findings, making it the most likely diagnosis. 

Rheumatoid arthritis (RA) is possible because of the patient's joint symptoms; however, it is not the correct answer because of negative RF and ACPA tests and skin plaques. 

Osteoarthritis might cause joint pain but does not typically present with prolonged morning stiffness, skin plaques, or the "pencil-in-cup" radiographic finding. 

Gout, an inflammatory arthritis, primarily affects the big toe and does not align with the patient's skin and radiographic manifestations. 

PsA is a chronic inflammatory arthritis that often develops in people with psoriasis. It affects roughly 0.05%- 0.25% of the general population and up to 41% of people with psoriasis. PsA is most seen in White patients between 35 and 55 years and affects both men and women equally. PsA is linked to a higher risk for obesity, hypertension, hyperlipidemia, type 2 diabetes, metabolic syndrome, and other conditions, including uveitis and inflammatory bowel disease.

Clinically, PsA presents with a diverse range of manifestations, encompassing peripheral joint inflammation, often with an asymmetric distribution; axial skeletal involvement reminiscent of spondylitis; dactylitis characterized by sausage-like swelling of fingers or toes; and enthesitis. Common symptoms or findings include early morning stiffness for > 30 minutes; joint pain, tenderness, and swelling; back pain aggravated by rest and relieved by exercise; limited joint motion; and deformity. Although most patients have a preceding condition in skin psoriasis, diagnosis of PsA is often delayed. Furthermore, nearly 80% of patients may exhibit nail changes, such as pitting or onycholysis, compared with about 40% of patients with psoriasis without arthritis. The heterogeneity of its clinical features often necessitates a comprehensive differential diagnosis to distinguish PsA from other spondyloarthropathies and rheumatic diseases. The most accepted classification criteria for PsA are the Classification of Psoriatic Arthritis (CASPAR) criteria, which have been used since 2006.

No laboratory tests are specific for PsA; however, a normal ESR and CRP level should not be used to rule out a diagnosis of PsA because these values are increased in only about 40% of patients. RF and ACPA are classically considered absent in PsA, and a negative RF is regarded as a criterion for diagnosing PsA per the CASPAR classification criteria. Radiographic changes show some characteristic patterns in PsA, including erosive damage, gross joint destruction, joint space narrowing, and "pencil-in-cup" deformity.

PsA treatment options have evolved over the years. Whereas in the past, nonsteroidal anti-inflammatory drugs, glucocorticoids, methotrexate, sulfasalazine, and cyclosporine were commonly prescribed, the development of immunologically targeted biological disease-modifying antirheumatic drugs (DMARDs) and targeted synthetic DMARDs since 2000 has revolutionized the treatment of PsA. Tumor necrosis factor inhibitors (ie, etanercept, infliximab, and adalimumab) have been shown to improve all domains (psoriatic and articular disease) of PsA and are considered a milestone in managing the condition. Other emerging therapeutic strategies in recent years have demonstrated efficacy in treating PsA, including monoclonal antibodies targeting interleukin (IL)-12, IL-23, and IL-17, as well as small-molecule phosphodiesterase 4 and Janus kinase inhibitors.

Although most of these options have the potential to be effective in all clinical domains of the disease, their cross-domain efficacy can vary from patient to patient. In some cases, treatment may not be practical or can lose effectiveness over time, and true disease remission is rare. As a result, clinicians must regularly assess each domain and aim to achieve remission or low disease activity across the different active domains while also being aware of potential adverse events.

Alan Irvine, MD, DSc, Consultant Dermatologist, ADI Dermatology LTD, Dublin, Ireland

Alan Irvine, MD, DSc, has disclosed the following relevant financial relationships:
Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.
Serve(d) as a speaker or member of a speakers bureau for: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.

Received income in an amount equal to or greater than $250 from: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.
 

Psoriatic arthritis (PsA) is consistent with the patient's joint pain, dactylitis, enthesitis, skin plaques, and radiographic findings, making it the most likely diagnosis. 

Rheumatoid arthritis (RA) is possible because of the patient's joint symptoms; however, it is not the correct answer because of negative RF and ACPA tests and skin plaques. 

Osteoarthritis might cause joint pain but does not typically present with prolonged morning stiffness, skin plaques, or the "pencil-in-cup" radiographic finding. 

Gout, an inflammatory arthritis, primarily affects the big toe and does not align with the patient's skin and radiographic manifestations. 

PsA is a chronic inflammatory arthritis that often develops in people with psoriasis. It affects roughly 0.05%- 0.25% of the general population and up to 41% of people with psoriasis. PsA is most seen in White patients between 35 and 55 years and affects both men and women equally. PsA is linked to a higher risk for obesity, hypertension, hyperlipidemia, type 2 diabetes, metabolic syndrome, and other conditions, including uveitis and inflammatory bowel disease.

Clinically, PsA presents with a diverse range of manifestations, encompassing peripheral joint inflammation, often with an asymmetric distribution; axial skeletal involvement reminiscent of spondylitis; dactylitis characterized by sausage-like swelling of fingers or toes; and enthesitis. Common symptoms or findings include early morning stiffness for > 30 minutes; joint pain, tenderness, and swelling; back pain aggravated by rest and relieved by exercise; limited joint motion; and deformity. Although most patients have a preceding condition in skin psoriasis, diagnosis of PsA is often delayed. Furthermore, nearly 80% of patients may exhibit nail changes, such as pitting or onycholysis, compared with about 40% of patients with psoriasis without arthritis. The heterogeneity of its clinical features often necessitates a comprehensive differential diagnosis to distinguish PsA from other spondyloarthropathies and rheumatic diseases. The most accepted classification criteria for PsA are the Classification of Psoriatic Arthritis (CASPAR) criteria, which have been used since 2006.

No laboratory tests are specific for PsA; however, a normal ESR and CRP level should not be used to rule out a diagnosis of PsA because these values are increased in only about 40% of patients. RF and ACPA are classically considered absent in PsA, and a negative RF is regarded as a criterion for diagnosing PsA per the CASPAR classification criteria. Radiographic changes show some characteristic patterns in PsA, including erosive damage, gross joint destruction, joint space narrowing, and "pencil-in-cup" deformity.

PsA treatment options have evolved over the years. Whereas in the past, nonsteroidal anti-inflammatory drugs, glucocorticoids, methotrexate, sulfasalazine, and cyclosporine were commonly prescribed, the development of immunologically targeted biological disease-modifying antirheumatic drugs (DMARDs) and targeted synthetic DMARDs since 2000 has revolutionized the treatment of PsA. Tumor necrosis factor inhibitors (ie, etanercept, infliximab, and adalimumab) have been shown to improve all domains (psoriatic and articular disease) of PsA and are considered a milestone in managing the condition. Other emerging therapeutic strategies in recent years have demonstrated efficacy in treating PsA, including monoclonal antibodies targeting interleukin (IL)-12, IL-23, and IL-17, as well as small-molecule phosphodiesterase 4 and Janus kinase inhibitors.

Although most of these options have the potential to be effective in all clinical domains of the disease, their cross-domain efficacy can vary from patient to patient. In some cases, treatment may not be practical or can lose effectiveness over time, and true disease remission is rare. As a result, clinicians must regularly assess each domain and aim to achieve remission or low disease activity across the different active domains while also being aware of potential adverse events.

Alan Irvine, MD, DSc, Consultant Dermatologist, ADI Dermatology LTD, Dublin, Ireland

Alan Irvine, MD, DSc, has disclosed the following relevant financial relationships:
Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.
Serve(d) as a speaker or member of a speakers bureau for: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.

Received income in an amount equal to or greater than $250 from: Sanofi; Abbvie; Regeneron; Leo; Pfizer; Janssen.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.
 

Given the patient's symptomatology, laboratory studies, and the histopathology and immunophenotyping of the polypoid lesions in the transverse colon, this patient is diagnosed with advanced mantle cell lymphoma (MCL). The gastroenterologist shares the findings with the patient, and over the next several days, a multidisciplinary team forms to guide the patient through potential next steps and treatment options. 

MCL is a type of B-cell neoplasm that, with advancements in the understanding of non-Hodgkin lymphoma (NHL) in the past 30 years, has been defined as its own clinicopathologic entity by the Revised European-American Lymphoma and World Health Organization classifications. Up to 10% of all non-Hodgkin lymphomas are MCL. Clinical presentation includes advanced disease with B symptoms (eg, night sweats, fever, weight loss), generalized lymphadenopathy, abdominal distention associated with hepatosplenomegaly, and fatigue. One of the most frequent areas for extra-nodal MCL presentation is the gastrointestinal tract. Men are more likely to present with MCL than are women by a ratio of 3:1. Median age at presentation is 67 years. 
 
Diagnosing MCL is a multipronged approach. Physical examination may reveal lymphadenopathy and hepatosplenomegaly. Lymph node biopsy and aspiration with immunophenotyping in MCL reveals monoclonal B cells expressing surface immunoglobulin (Ig), IgM, or IgD, which are characteristically CD5+ and pan B-cell antigen–positive (eg, CD19, CD20, CD22) but lack expression of CD10 and CD23 and overexpress cyclin D1. Bone marrow aspirate/biopsy are used more for staging than for diagnosis. Blood studies, including anemia and cytopenias secondary to bone marrow infiltration (with up to 40% of cases showing lymphocytosis > 4000/μL), abnormal liver function tests, and a negative Coombs test, also help diagnose MCL. Gastrointestinal involvement of MCL typically presents as lymphoid polyposis on colonoscopy imaging and can appear in the colon, ileum, stomach, and duodenum.

Pathogenesis of MCL involves disordered lymphoproliferation in a subset of naive pregerminal center cells in primary follicles or in the mantle region of secondary follicles. Most cases are linked with translocation of chromosome 14 and 11, which induces overexpression of protein cyclin D1. Viral infection (Epstein-Barr virus, HIV, human T-lymphotropic virus type 1, human herpes virus 6), environmental factors, and primary and secondary immunodeficiency are also associated with the development of NHL.

Patient education should include detailed information about clinical trials, available treatment options and associated adverse events, as well as psychosocial and nutrition counseling. 

Chemoimmunotherapy is standard initial treatment for MCL, but relapse is expected. Chemotherapy-free regimens with biologic targets, when used in second-line treatment, have increasingly become an important first-line treatment given their efficacy in the relapsed/refractory setting. Chimeric antigen receptor T-cell therapy is also a second-line treatment option. In patients with MCL and a TP53 mutation, clinical trial participation is encouraged because of poor prognosis.

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Given the patient's symptomatology, laboratory studies, and the histopathology and immunophenotyping of the polypoid lesions in the transverse colon, this patient is diagnosed with advanced mantle cell lymphoma (MCL). The gastroenterologist shares the findings with the patient, and over the next several days, a multidisciplinary team forms to guide the patient through potential next steps and treatment options. 

MCL is a type of B-cell neoplasm that, with advancements in the understanding of non-Hodgkin lymphoma (NHL) in the past 30 years, has been defined as its own clinicopathologic entity by the Revised European-American Lymphoma and World Health Organization classifications. Up to 10% of all non-Hodgkin lymphomas are MCL. Clinical presentation includes advanced disease with B symptoms (eg, night sweats, fever, weight loss), generalized lymphadenopathy, abdominal distention associated with hepatosplenomegaly, and fatigue. One of the most frequent areas for extra-nodal MCL presentation is the gastrointestinal tract. Men are more likely to present with MCL than are women by a ratio of 3:1. Median age at presentation is 67 years. 
 
Diagnosing MCL is a multipronged approach. Physical examination may reveal lymphadenopathy and hepatosplenomegaly. Lymph node biopsy and aspiration with immunophenotyping in MCL reveals monoclonal B cells expressing surface immunoglobulin (Ig), IgM, or IgD, which are characteristically CD5+ and pan B-cell antigen–positive (eg, CD19, CD20, CD22) but lack expression of CD10 and CD23 and overexpress cyclin D1. Bone marrow aspirate/biopsy are used more for staging than for diagnosis. Blood studies, including anemia and cytopenias secondary to bone marrow infiltration (with up to 40% of cases showing lymphocytosis > 4000/μL), abnormal liver function tests, and a negative Coombs test, also help diagnose MCL. Gastrointestinal involvement of MCL typically presents as lymphoid polyposis on colonoscopy imaging and can appear in the colon, ileum, stomach, and duodenum.

Pathogenesis of MCL involves disordered lymphoproliferation in a subset of naive pregerminal center cells in primary follicles or in the mantle region of secondary follicles. Most cases are linked with translocation of chromosome 14 and 11, which induces overexpression of protein cyclin D1. Viral infection (Epstein-Barr virus, HIV, human T-lymphotropic virus type 1, human herpes virus 6), environmental factors, and primary and secondary immunodeficiency are also associated with the development of NHL.

Patient education should include detailed information about clinical trials, available treatment options and associated adverse events, as well as psychosocial and nutrition counseling. 

Chemoimmunotherapy is standard initial treatment for MCL, but relapse is expected. Chemotherapy-free regimens with biologic targets, when used in second-line treatment, have increasingly become an important first-line treatment given their efficacy in the relapsed/refractory setting. Chimeric antigen receptor T-cell therapy is also a second-line treatment option. In patients with MCL and a TP53 mutation, clinical trial participation is encouraged because of poor prognosis.

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Given the patient's symptomatology, laboratory studies, and the histopathology and immunophenotyping of the polypoid lesions in the transverse colon, this patient is diagnosed with advanced mantle cell lymphoma (MCL). The gastroenterologist shares the findings with the patient, and over the next several days, a multidisciplinary team forms to guide the patient through potential next steps and treatment options. 

MCL is a type of B-cell neoplasm that, with advancements in the understanding of non-Hodgkin lymphoma (NHL) in the past 30 years, has been defined as its own clinicopathologic entity by the Revised European-American Lymphoma and World Health Organization classifications. Up to 10% of all non-Hodgkin lymphomas are MCL. Clinical presentation includes advanced disease with B symptoms (eg, night sweats, fever, weight loss), generalized lymphadenopathy, abdominal distention associated with hepatosplenomegaly, and fatigue. One of the most frequent areas for extra-nodal MCL presentation is the gastrointestinal tract. Men are more likely to present with MCL than are women by a ratio of 3:1. Median age at presentation is 67 years. 
 
Diagnosing MCL is a multipronged approach. Physical examination may reveal lymphadenopathy and hepatosplenomegaly. Lymph node biopsy and aspiration with immunophenotyping in MCL reveals monoclonal B cells expressing surface immunoglobulin (Ig), IgM, or IgD, which are characteristically CD5+ and pan B-cell antigen–positive (eg, CD19, CD20, CD22) but lack expression of CD10 and CD23 and overexpress cyclin D1. Bone marrow aspirate/biopsy are used more for staging than for diagnosis. Blood studies, including anemia and cytopenias secondary to bone marrow infiltration (with up to 40% of cases showing lymphocytosis > 4000/μL), abnormal liver function tests, and a negative Coombs test, also help diagnose MCL. Gastrointestinal involvement of MCL typically presents as lymphoid polyposis on colonoscopy imaging and can appear in the colon, ileum, stomach, and duodenum.

Pathogenesis of MCL involves disordered lymphoproliferation in a subset of naive pregerminal center cells in primary follicles or in the mantle region of secondary follicles. Most cases are linked with translocation of chromosome 14 and 11, which induces overexpression of protein cyclin D1. Viral infection (Epstein-Barr virus, HIV, human T-lymphotropic virus type 1, human herpes virus 6), environmental factors, and primary and secondary immunodeficiency are also associated with the development of NHL.

Patient education should include detailed information about clinical trials, available treatment options and associated adverse events, as well as psychosocial and nutrition counseling. 

Chemoimmunotherapy is standard initial treatment for MCL, but relapse is expected. Chemotherapy-free regimens with biologic targets, when used in second-line treatment, have increasingly become an important first-line treatment given their efficacy in the relapsed/refractory setting. Chimeric antigen receptor T-cell therapy is also a second-line treatment option. In patients with MCL and a TP53 mutation, clinical trial participation is encouraged because of poor prognosis.

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Given her symptomatology, imaging, and laboratory study results, this patient is diagnosed with small cell lung cancer (SCLC) and brain metastases. The pulmonologist shares the findings with the patient, and over the next several days, a multidisciplinary team, which includes oncology and radiology, forms to guide the patient through staging and treatment options. 

SCLC is a neuroendocrine carcinoma, which is an aggressive form of lung cancer associated with rapid growth and early spread to distant sites and frequent association with distinct paraneoplastic syndromes. Approximately 13% of newly diagnosed lung cancers are SCLC. Clinical presentation is often advanced stage and includes shortness of breath, cough, bone pain, weight loss, fatigue, and neurologic dysfunction, including blurred vision, dizziness, and headaches that disturb sleep. Typically, symptom onset is quick, with the duration of symptoms lasting between 8 and 12 weeks before presentation. 
 
According to CHEST guidelines, when clinical and radiographic findings suggest SCLC, diagnosis should be confirmed using the least invasive technique possible on the basis of presentation. Fine-needle aspiration or biopsy is recommended to assess a suspicious singular extrathoracic site for metastasis. If that approach is not feasible, guidelines recommend diagnosing the primary lung lesion. If there is an accessible pleural effusion, ultrasound-guided thoracentesis is recommended for diagnosis. If the result of pleural fluid cytology is negative, pleural biopsy using image-guided pleural biopsy, medical, or surgical thoracoscopy is recommended next. Common mutations associated with SCLC include RB1 and TP53 gene mutations.

Nearly all patients with SCLC (98%) have a history of tobacco use. Uranium or radon exposure has also been linked to SCLC. Pathogenesis occurs in the peribronchial region of the respiratory system and moves into the bronchial submucosa. Widespread metastases can appear early during SCLC and generally affect mediastinal lymph nodes, bones, brain, liver, and adrenal glands.

Patient education should include information about clinical trials, available treatment options, and associated adverse events. Smoking cessation is encouraged for current smokers with SCLC. 

For patients with extensive-stage metastatic SCLC, the new standard of care combines the immunotherapy atezolizumab, a humanized monoclonal anti–programmed death–ligand 1 (PD-L1) antibody, with chemotherapy (cisplatin-etoposide). When used in the first-line setting, this combination has been shown to improve survival outcomes. Of course, clinical trials are ongoing; other treatments in development include additional classes of immunotherapies (programmed cell death protein1 [PD-1] inhibitor antibody, anti-PD1 antibody, and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) inhibitor antibody) and targeted therapies (delta-like protein 3 antibody-drug conjugate). 
 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Given her symptomatology, imaging, and laboratory study results, this patient is diagnosed with small cell lung cancer (SCLC) and brain metastases. The pulmonologist shares the findings with the patient, and over the next several days, a multidisciplinary team, which includes oncology and radiology, forms to guide the patient through staging and treatment options. 

SCLC is a neuroendocrine carcinoma, which is an aggressive form of lung cancer associated with rapid growth and early spread to distant sites and frequent association with distinct paraneoplastic syndromes. Approximately 13% of newly diagnosed lung cancers are SCLC. Clinical presentation is often advanced stage and includes shortness of breath, cough, bone pain, weight loss, fatigue, and neurologic dysfunction, including blurred vision, dizziness, and headaches that disturb sleep. Typically, symptom onset is quick, with the duration of symptoms lasting between 8 and 12 weeks before presentation. 
 
According to CHEST guidelines, when clinical and radiographic findings suggest SCLC, diagnosis should be confirmed using the least invasive technique possible on the basis of presentation. Fine-needle aspiration or biopsy is recommended to assess a suspicious singular extrathoracic site for metastasis. If that approach is not feasible, guidelines recommend diagnosing the primary lung lesion. If there is an accessible pleural effusion, ultrasound-guided thoracentesis is recommended for diagnosis. If the result of pleural fluid cytology is negative, pleural biopsy using image-guided pleural biopsy, medical, or surgical thoracoscopy is recommended next. Common mutations associated with SCLC include RB1 and TP53 gene mutations.

Nearly all patients with SCLC (98%) have a history of tobacco use. Uranium or radon exposure has also been linked to SCLC. Pathogenesis occurs in the peribronchial region of the respiratory system and moves into the bronchial submucosa. Widespread metastases can appear early during SCLC and generally affect mediastinal lymph nodes, bones, brain, liver, and adrenal glands.

Patient education should include information about clinical trials, available treatment options, and associated adverse events. Smoking cessation is encouraged for current smokers with SCLC. 

For patients with extensive-stage metastatic SCLC, the new standard of care combines the immunotherapy atezolizumab, a humanized monoclonal anti–programmed death–ligand 1 (PD-L1) antibody, with chemotherapy (cisplatin-etoposide). When used in the first-line setting, this combination has been shown to improve survival outcomes. Of course, clinical trials are ongoing; other treatments in development include additional classes of immunotherapies (programmed cell death protein1 [PD-1] inhibitor antibody, anti-PD1 antibody, and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) inhibitor antibody) and targeted therapies (delta-like protein 3 antibody-drug conjugate). 
 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Given her symptomatology, imaging, and laboratory study results, this patient is diagnosed with small cell lung cancer (SCLC) and brain metastases. The pulmonologist shares the findings with the patient, and over the next several days, a multidisciplinary team, which includes oncology and radiology, forms to guide the patient through staging and treatment options. 

SCLC is a neuroendocrine carcinoma, which is an aggressive form of lung cancer associated with rapid growth and early spread to distant sites and frequent association with distinct paraneoplastic syndromes. Approximately 13% of newly diagnosed lung cancers are SCLC. Clinical presentation is often advanced stage and includes shortness of breath, cough, bone pain, weight loss, fatigue, and neurologic dysfunction, including blurred vision, dizziness, and headaches that disturb sleep. Typically, symptom onset is quick, with the duration of symptoms lasting between 8 and 12 weeks before presentation. 
 
According to CHEST guidelines, when clinical and radiographic findings suggest SCLC, diagnosis should be confirmed using the least invasive technique possible on the basis of presentation. Fine-needle aspiration or biopsy is recommended to assess a suspicious singular extrathoracic site for metastasis. If that approach is not feasible, guidelines recommend diagnosing the primary lung lesion. If there is an accessible pleural effusion, ultrasound-guided thoracentesis is recommended for diagnosis. If the result of pleural fluid cytology is negative, pleural biopsy using image-guided pleural biopsy, medical, or surgical thoracoscopy is recommended next. Common mutations associated with SCLC include RB1 and TP53 gene mutations.

Nearly all patients with SCLC (98%) have a history of tobacco use. Uranium or radon exposure has also been linked to SCLC. Pathogenesis occurs in the peribronchial region of the respiratory system and moves into the bronchial submucosa. Widespread metastases can appear early during SCLC and generally affect mediastinal lymph nodes, bones, brain, liver, and adrenal glands.

Patient education should include information about clinical trials, available treatment options, and associated adverse events. Smoking cessation is encouraged for current smokers with SCLC. 

For patients with extensive-stage metastatic SCLC, the new standard of care combines the immunotherapy atezolizumab, a humanized monoclonal anti–programmed death–ligand 1 (PD-L1) antibody, with chemotherapy (cisplatin-etoposide). When used in the first-line setting, this combination has been shown to improve survival outcomes. Of course, clinical trials are ongoing; other treatments in development include additional classes of immunotherapies (programmed cell death protein1 [PD-1] inhibitor antibody, anti-PD1 antibody, and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) inhibitor antibody) and targeted therapies (delta-like protein 3 antibody-drug conjugate). 
 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

This patient's symptoms go beyond just memory problems: She has difficulty with daily tasks, shows behavioral changes, and has significant communication difficulties — symptoms not found in mild cognitive impairment. While the patient has some behavioral changes, she does not exhibit the pronounced personality changes typical of frontotemporal dementia. Finally, the patient's cognitive decline is gradual and consistent without the stepwise progression typical of vascular dementia. Given the comprehensive presentation of the patient's symptoms and the results of her clinical investigations, middle-stage Alzheimer's disease is the most fitting diagnosis.

Alzheimer's disease is a progressive and irreversible brain disorder that affects memory, behavior, and cognitive skills. This condition causes the degeneration and death of brain cells, leading to various cognitive issues. Alzheimer's disease is the most common cause of dementia and accounts for 60%-80% of dementia cases. Although the exact cause is unknown, it is believed to result from genetic, lifestyle, and environmental factors. Alzheimer's disease progresses through stages — mild (early stage), moderate (middle stage), and severe (late stage) — and each stage has different signs and symptoms.

Alzheimer's disease is commonly observed in individuals 65 years or older, as age is the most significant risk factor. Another risk factor for Alzheimer's disease is family history; individuals who have parents or siblings with Alzheimer's disease are more likely to develop the disease. The risk increases with the number of family members diagnosed with the disease. Genetics also contribute to the development of Alzheimer's disease. Genes for developing Alzheimer's disease have been classified as deterministic and risk genes, which imply that they can cause the disease or increase the risk of developing it; however, the deterministic gene, which almost guarantees the occurrence of Alzheimer's, is rare and is found in less than 1% of cases. Experiencing a head injury is also a possible risk factor for Alzheimer's disease.

Accurate diagnosis of Alzheimer's disease requires a thorough history and physical examination. Gathering information from the patient's family and caregivers is important because some patients may not be aware of their condition. It is common for Alzheimer's disease patients to experience "sundowning," which causes confusion, agitation, and behavioral issues in the evening. A comprehensive physical examination, including a detailed neurologic and mental status exam, is necessary to determine the stage of the disease and rule out other conditions. Typically, the neurologic exam of Alzheimer's disease patients is normal.

Volumetric MRI is a recent technique that allows precise measurement of changes in brain volume. In Alzheimer's disease, shrinkage in the medial temporal lobe is visible through volumetric MRI. However, hippocampal atrophy is also a normal part of age-related memory decline, which raises doubts about the appropriateness of using volumetric MRI for early detection of Alzheimer's disease. The full potential of volumetric MRI in aiding the diagnosis of Alzheimer's disease is yet to be fully established.

Alzheimer's disease has no known cure, and treatment options are limited to addressing symptoms. Currently, three types of drugs are approved for treating the moderate or severe stages of the disease: cholinesterase inhibitors, partial N-methyl D-aspartate (NMDA) antagonists, and amyloid-directed antibodies. Cholinesterase inhibitors increase acetylcholine levels, a chemical crucial for cognitive functions such as memory and learning. NMDA antagonists (memantine) blocks NMDA receptors whose overactivation is implicated in Alzheimer's disease and related to synaptic dysfunction. Antiamyloid monoclonal antibodies bind to and promote the clearance of amyloid-beta peptides, thereby reducing amyloid plaques in the brain, which are associated with Alzheimer's disease.

Jasvinder Chawla, MD, Professor of Neurology, Loyola University Medical Center, Maywood; Director, Clinical Neurophysiology Lab, Department of Neurology, Hines VA Hospital, Hines, IL.

Jasvinder Chawla, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

This patient's symptoms go beyond just memory problems: She has difficulty with daily tasks, shows behavioral changes, and has significant communication difficulties — symptoms not found in mild cognitive impairment. While the patient has some behavioral changes, she does not exhibit the pronounced personality changes typical of frontotemporal dementia. Finally, the patient's cognitive decline is gradual and consistent without the stepwise progression typical of vascular dementia. Given the comprehensive presentation of the patient's symptoms and the results of her clinical investigations, middle-stage Alzheimer's disease is the most fitting diagnosis.

Alzheimer's disease is a progressive and irreversible brain disorder that affects memory, behavior, and cognitive skills. This condition causes the degeneration and death of brain cells, leading to various cognitive issues. Alzheimer's disease is the most common cause of dementia and accounts for 60%-80% of dementia cases. Although the exact cause is unknown, it is believed to result from genetic, lifestyle, and environmental factors. Alzheimer's disease progresses through stages — mild (early stage), moderate (middle stage), and severe (late stage) — and each stage has different signs and symptoms.

Alzheimer's disease is commonly observed in individuals 65 years or older, as age is the most significant risk factor. Another risk factor for Alzheimer's disease is family history; individuals who have parents or siblings with Alzheimer's disease are more likely to develop the disease. The risk increases with the number of family members diagnosed with the disease. Genetics also contribute to the development of Alzheimer's disease. Genes for developing Alzheimer's disease have been classified as deterministic and risk genes, which imply that they can cause the disease or increase the risk of developing it; however, the deterministic gene, which almost guarantees the occurrence of Alzheimer's, is rare and is found in less than 1% of cases. Experiencing a head injury is also a possible risk factor for Alzheimer's disease.

Accurate diagnosis of Alzheimer's disease requires a thorough history and physical examination. Gathering information from the patient's family and caregivers is important because some patients may not be aware of their condition. It is common for Alzheimer's disease patients to experience "sundowning," which causes confusion, agitation, and behavioral issues in the evening. A comprehensive physical examination, including a detailed neurologic and mental status exam, is necessary to determine the stage of the disease and rule out other conditions. Typically, the neurologic exam of Alzheimer's disease patients is normal.

Volumetric MRI is a recent technique that allows precise measurement of changes in brain volume. In Alzheimer's disease, shrinkage in the medial temporal lobe is visible through volumetric MRI. However, hippocampal atrophy is also a normal part of age-related memory decline, which raises doubts about the appropriateness of using volumetric MRI for early detection of Alzheimer's disease. The full potential of volumetric MRI in aiding the diagnosis of Alzheimer's disease is yet to be fully established.

Alzheimer's disease has no known cure, and treatment options are limited to addressing symptoms. Currently, three types of drugs are approved for treating the moderate or severe stages of the disease: cholinesterase inhibitors, partial N-methyl D-aspartate (NMDA) antagonists, and amyloid-directed antibodies. Cholinesterase inhibitors increase acetylcholine levels, a chemical crucial for cognitive functions such as memory and learning. NMDA antagonists (memantine) blocks NMDA receptors whose overactivation is implicated in Alzheimer's disease and related to synaptic dysfunction. Antiamyloid monoclonal antibodies bind to and promote the clearance of amyloid-beta peptides, thereby reducing amyloid plaques in the brain, which are associated with Alzheimer's disease.

Jasvinder Chawla, MD, Professor of Neurology, Loyola University Medical Center, Maywood; Director, Clinical Neurophysiology Lab, Department of Neurology, Hines VA Hospital, Hines, IL.

Jasvinder Chawla, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

This patient's symptoms go beyond just memory problems: She has difficulty with daily tasks, shows behavioral changes, and has significant communication difficulties — symptoms not found in mild cognitive impairment. While the patient has some behavioral changes, she does not exhibit the pronounced personality changes typical of frontotemporal dementia. Finally, the patient's cognitive decline is gradual and consistent without the stepwise progression typical of vascular dementia. Given the comprehensive presentation of the patient's symptoms and the results of her clinical investigations, middle-stage Alzheimer's disease is the most fitting diagnosis.

Alzheimer's disease is a progressive and irreversible brain disorder that affects memory, behavior, and cognitive skills. This condition causes the degeneration and death of brain cells, leading to various cognitive issues. Alzheimer's disease is the most common cause of dementia and accounts for 60%-80% of dementia cases. Although the exact cause is unknown, it is believed to result from genetic, lifestyle, and environmental factors. Alzheimer's disease progresses through stages — mild (early stage), moderate (middle stage), and severe (late stage) — and each stage has different signs and symptoms.

Alzheimer's disease is commonly observed in individuals 65 years or older, as age is the most significant risk factor. Another risk factor for Alzheimer's disease is family history; individuals who have parents or siblings with Alzheimer's disease are more likely to develop the disease. The risk increases with the number of family members diagnosed with the disease. Genetics also contribute to the development of Alzheimer's disease. Genes for developing Alzheimer's disease have been classified as deterministic and risk genes, which imply that they can cause the disease or increase the risk of developing it; however, the deterministic gene, which almost guarantees the occurrence of Alzheimer's, is rare and is found in less than 1% of cases. Experiencing a head injury is also a possible risk factor for Alzheimer's disease.

Accurate diagnosis of Alzheimer's disease requires a thorough history and physical examination. Gathering information from the patient's family and caregivers is important because some patients may not be aware of their condition. It is common for Alzheimer's disease patients to experience "sundowning," which causes confusion, agitation, and behavioral issues in the evening. A comprehensive physical examination, including a detailed neurologic and mental status exam, is necessary to determine the stage of the disease and rule out other conditions. Typically, the neurologic exam of Alzheimer's disease patients is normal.

Volumetric MRI is a recent technique that allows precise measurement of changes in brain volume. In Alzheimer's disease, shrinkage in the medial temporal lobe is visible through volumetric MRI. However, hippocampal atrophy is also a normal part of age-related memory decline, which raises doubts about the appropriateness of using volumetric MRI for early detection of Alzheimer's disease. The full potential of volumetric MRI in aiding the diagnosis of Alzheimer's disease is yet to be fully established.

Alzheimer's disease has no known cure, and treatment options are limited to addressing symptoms. Currently, three types of drugs are approved for treating the moderate or severe stages of the disease: cholinesterase inhibitors, partial N-methyl D-aspartate (NMDA) antagonists, and amyloid-directed antibodies. Cholinesterase inhibitors increase acetylcholine levels, a chemical crucial for cognitive functions such as memory and learning. NMDA antagonists (memantine) blocks NMDA receptors whose overactivation is implicated in Alzheimer's disease and related to synaptic dysfunction. Antiamyloid monoclonal antibodies bind to and promote the clearance of amyloid-beta peptides, thereby reducing amyloid plaques in the brain, which are associated with Alzheimer's disease.

Jasvinder Chawla, MD, Professor of Neurology, Loyola University Medical Center, Maywood; Director, Clinical Neurophysiology Lab, Department of Neurology, Hines VA Hospital, Hines, IL.

Jasvinder Chawla, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Breast cancer is the most common tumor type and second only to lung cancer as a cause of cancer death in women. Nearly 300,000 women (and 2800 men) will receive a new diagnosis of breast cancer in the United States in 2023. Despite improvements in treatment options, breast cancer still will lead to 43,700 deaths among women this year. 

Breast tumors generally are either ductal or lobular in origin. Ductal carcinomas arise in the lining of the milk ducts and are the most commonly found tumor type in breast cancer. Almost 3 in 4 diagnosed breast cancers histologically are invasive ductal carcinomas, which have spread from the source into surrounding structures. It has no specific histologic indicators and is differentiated from ductal carcinoma in situ by its having spread outside the duct. The presence of lymph node involvement in this patient also confirms invasive ductal carcinoma without metastatic spread. Invasive lobular carcinomas occur much less frequently and have a different histologic appearance of smaller cells that appear to be arranged in linear groups.

Mammography involves low-dose radiation and is used in diagnosis and is the most widely used screening technique for breast cancer. As a screening tool, mammography may detect lesions 1-2 years before they become palpable on breast self-examination. While the incidence of breast cancer in women has slowly increased over the past 20 years, mortality has decreased largely as a result of improved awareness and uptake of screening mammography. Current American Cancer Society guidelines recommend continued mammography screenings at least every other year after age 55 and continued for as long as a woman has a life expectancy > 10 years. Screening or diagnosis using MRI is usually reserved for individuals at high risk for breast cancer or a history of breast cancer before age 50. 

For all newly diagnosed primary invasive breast cancers, biomarker testing for estrogen and progesterone receptor expression and HER2 expression are part of the standard workup recommended by the American Society of Clinical Oncology (ASCO) and the National Comprehensive Cancer Network (NCCN) to help guide treatment decisions. Biomarker testing showed that her tumor was ER+ and HER2-negative, the most common finding in breast cancer. The patient's history did not suggest a risk for BRCA or other familial cancer mutations, but molecular testing was done and was negative for BRCA1 and BRCA2. In postmenopausal women, ASCO and NCCN also recommend use of risk assessment tools, such as Oncotype DX, to determine whether chemotherapy will add benefit to systemic endocrine therapy. Postmenopausal patients with ER+/HER2-negative breast cancer, one to three positive nodes, and a score < 26 on the 21-gene Oncotype DX can safely forego cytotoxic chemotherapy and derive maximum survival benefit from hormonal therapy alone.

This patient was diagnosed with a primary tumor of approximately 25 mm, metastasis to two ipsilateral nodes, and no distant metastasis, or stage IIIA. Her risk recurrence score was 20, indicating that she could safely forego the rigors of cytotoxic chemotherapy. She underwent localized breast-conserving surgery and began adjuvant tamoxifen therapy (x 2 years) to be followed with an aromatase inhibitor (x 3 years). 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Breast cancer is the most common tumor type and second only to lung cancer as a cause of cancer death in women. Nearly 300,000 women (and 2800 men) will receive a new diagnosis of breast cancer in the United States in 2023. Despite improvements in treatment options, breast cancer still will lead to 43,700 deaths among women this year. 

Breast tumors generally are either ductal or lobular in origin. Ductal carcinomas arise in the lining of the milk ducts and are the most commonly found tumor type in breast cancer. Almost 3 in 4 diagnosed breast cancers histologically are invasive ductal carcinomas, which have spread from the source into surrounding structures. It has no specific histologic indicators and is differentiated from ductal carcinoma in situ by its having spread outside the duct. The presence of lymph node involvement in this patient also confirms invasive ductal carcinoma without metastatic spread. Invasive lobular carcinomas occur much less frequently and have a different histologic appearance of smaller cells that appear to be arranged in linear groups.

Mammography involves low-dose radiation and is used in diagnosis and is the most widely used screening technique for breast cancer. As a screening tool, mammography may detect lesions 1-2 years before they become palpable on breast self-examination. While the incidence of breast cancer in women has slowly increased over the past 20 years, mortality has decreased largely as a result of improved awareness and uptake of screening mammography. Current American Cancer Society guidelines recommend continued mammography screenings at least every other year after age 55 and continued for as long as a woman has a life expectancy > 10 years. Screening or diagnosis using MRI is usually reserved for individuals at high risk for breast cancer or a history of breast cancer before age 50. 

For all newly diagnosed primary invasive breast cancers, biomarker testing for estrogen and progesterone receptor expression and HER2 expression are part of the standard workup recommended by the American Society of Clinical Oncology (ASCO) and the National Comprehensive Cancer Network (NCCN) to help guide treatment decisions. Biomarker testing showed that her tumor was ER+ and HER2-negative, the most common finding in breast cancer. The patient's history did not suggest a risk for BRCA or other familial cancer mutations, but molecular testing was done and was negative for BRCA1 and BRCA2. In postmenopausal women, ASCO and NCCN also recommend use of risk assessment tools, such as Oncotype DX, to determine whether chemotherapy will add benefit to systemic endocrine therapy. Postmenopausal patients with ER+/HER2-negative breast cancer, one to three positive nodes, and a score < 26 on the 21-gene Oncotype DX can safely forego cytotoxic chemotherapy and derive maximum survival benefit from hormonal therapy alone.

This patient was diagnosed with a primary tumor of approximately 25 mm, metastasis to two ipsilateral nodes, and no distant metastasis, or stage IIIA. Her risk recurrence score was 20, indicating that she could safely forego the rigors of cytotoxic chemotherapy. She underwent localized breast-conserving surgery and began adjuvant tamoxifen therapy (x 2 years) to be followed with an aromatase inhibitor (x 3 years). 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Breast cancer is the most common tumor type and second only to lung cancer as a cause of cancer death in women. Nearly 300,000 women (and 2800 men) will receive a new diagnosis of breast cancer in the United States in 2023. Despite improvements in treatment options, breast cancer still will lead to 43,700 deaths among women this year. 

Breast tumors generally are either ductal or lobular in origin. Ductal carcinomas arise in the lining of the milk ducts and are the most commonly found tumor type in breast cancer. Almost 3 in 4 diagnosed breast cancers histologically are invasive ductal carcinomas, which have spread from the source into surrounding structures. It has no specific histologic indicators and is differentiated from ductal carcinoma in situ by its having spread outside the duct. The presence of lymph node involvement in this patient also confirms invasive ductal carcinoma without metastatic spread. Invasive lobular carcinomas occur much less frequently and have a different histologic appearance of smaller cells that appear to be arranged in linear groups.

Mammography involves low-dose radiation and is used in diagnosis and is the most widely used screening technique for breast cancer. As a screening tool, mammography may detect lesions 1-2 years before they become palpable on breast self-examination. While the incidence of breast cancer in women has slowly increased over the past 20 years, mortality has decreased largely as a result of improved awareness and uptake of screening mammography. Current American Cancer Society guidelines recommend continued mammography screenings at least every other year after age 55 and continued for as long as a woman has a life expectancy > 10 years. Screening or diagnosis using MRI is usually reserved for individuals at high risk for breast cancer or a history of breast cancer before age 50. 

For all newly diagnosed primary invasive breast cancers, biomarker testing for estrogen and progesterone receptor expression and HER2 expression are part of the standard workup recommended by the American Society of Clinical Oncology (ASCO) and the National Comprehensive Cancer Network (NCCN) to help guide treatment decisions. Biomarker testing showed that her tumor was ER+ and HER2-negative, the most common finding in breast cancer. The patient's history did not suggest a risk for BRCA or other familial cancer mutations, but molecular testing was done and was negative for BRCA1 and BRCA2. In postmenopausal women, ASCO and NCCN also recommend use of risk assessment tools, such as Oncotype DX, to determine whether chemotherapy will add benefit to systemic endocrine therapy. Postmenopausal patients with ER+/HER2-negative breast cancer, one to three positive nodes, and a score < 26 on the 21-gene Oncotype DX can safely forego cytotoxic chemotherapy and derive maximum survival benefit from hormonal therapy alone.

This patient was diagnosed with a primary tumor of approximately 25 mm, metastasis to two ipsilateral nodes, and no distant metastasis, or stage IIIA. Her risk recurrence score was 20, indicating that she could safely forego the rigors of cytotoxic chemotherapy. She underwent localized breast-conserving surgery and began adjuvant tamoxifen therapy (x 2 years) to be followed with an aromatase inhibitor (x 3 years). 

Karl J. D'Silva, MD, Clinical Assistant Professor, Department of Medicine, Tufts University School of Medicine, Boston; Medical Director, Department of Oncology and Hematology, Lahey Hospital and Medical Center, Peabody, Massachusetts.

Karl J. D'Silva, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Psoriatic arthritis (PsA) is an immune-mediated arthritis that is almost always associated with plaque psoriasis. PsA is diagnosed in about 20% of patients with plaque psoriasis, and, in most patients, a diagnosis of plaque psoriasis precedes PsA development. However, in this patient, PsA appears to have become symptomatic at about the same time as the skin symptoms behind his ears, which is consistent with studies showing that PsA co-occurs with plaque psoriasis in 15% of patients and precedes plaque psoriasis diagnosis in 17% of patients. Environmental risk factors for PsA in genetically susceptible patients with plaque psoriasis include joint trauma, streptococcal infection, and certain antibiotics. Smoking appears to have a protective effect in PsA. PsA is more highly associated with severe plaque psoriasis than with mild plaque psoriasis.

PsA has a heterogeneous presentation, which may challenge diagnosis. It is classified by the degree of joint involvement as oligoarticular (four or fewer joints) or polyarticular (five or more joints). Radiographically, there are five main types of PsA, one of which is predominant involvement of the distal interphalangeal joint (DIP) joints — the form seen in this patient. The other four types of PsA are symmetrical peripheral polyarthritis, asymmetrical mono- or oligoarthritis, axial spondyloarthropathy, and arthritis mutilans. DIP joint involvement with proliferative bone changes suggests a diagnosis of PsA over rheumatoid arthritis.

PsA is diagnosed using radiography, skin biopsy of affected skin areas, and complete blood and metabolic assessments. With advanced PsA, radiographs typically reveal bone destruction and disease-related bone formation (juxta-articular bone formation), resulting in erosions, joint destruction, and joint-space narrowing. Juxta-articular bone formation (presenting poorly defined ossification adjacent to the joint margin) is often the earliest radiographic clue before erosions may occur. Enthesitis in multiple entheses is typical of PsA vs osteoarthritis or mechanical injury. There are no specific tests to confirm PsA. Patients with PsA usually are rheumatoid factor negative. Inflammatory biomarkers, such as C-reactive protein and erythrocyte sedimentation rate, are elevated in about 40% of patients with PsA. 

In addition to plaques, extra-articular manifestations of PsA may include nail changes and chronic bilateral ocular disease. PsA is an articular manifestation of psoriasis but is still a systemic disease with deleterious effects on cardiometabolic factors; increased mortality with myocardial infarction; and possible involvement of other immune-mediated diseases, such as inflammatory bowel disease, that share a common pathway of tumor necrosis factor (TNF) alpha overexpression. 

Early treatment with disease-modifying drugs plus nonpharmacologic interventions is crucial to minimizing disability progression and optimizing patients' quality of life. Nonpharmacologic interventions include physical and occupational therapy and exercise. Symptomatic therapies (nonsteroidal anti-inflammatory drugs or steroids) can be used to relieve mild symptoms. Assessment for cardiometabolic, renal, and other systemic impacts of PsA is essential. 

Biologic therapies are key to preventing disease progression. The most broadly targeted are the TNF-alpha inhibitors, which are commonly recommended as first-line therapy in moderate to severe PsA or in patients with radiographic damage. The interleukin (IL)-17 inhibitors ixekizumab and secukinumab and the IL-12/23 inhibitor ustekinumab have targets downstream of TNF-alpha. Treatment options also include oral small molecule inhibitors of phosphodiesterase 4 (apremilast) or Janus kinase (tofacitinib, upadacitinib). Recognition of the role of IL-23 as a key cytokine in PsA development through promotion of Th17 differentiation has led to availability of drugs specifically targeting IL-23(p19) (guselkumab, tildrakizumab, and risankizumab). All have been studied, but only guselkumab and risankizumab currently are approved for treatment of PsA. Each class of drugs has specific benefits and risks, which should be discussed with patients before treatment initiation. Patient comorbidities should also be considered in choosing treatment. 

Herbert S. Diamond, MD, Professor of Medicine (retired), Temple University School of Medicine, University of Pittsburgh; Chairman, Department of Medicine Emeritus, Western Pennsylvania Hospital, Pittsburgh, PA.

Herbert S. Diamond, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Psoriatic arthritis (PsA) is an immune-mediated arthritis that is almost always associated with plaque psoriasis. PsA is diagnosed in about 20% of patients with plaque psoriasis, and, in most patients, a diagnosis of plaque psoriasis precedes PsA development. However, in this patient, PsA appears to have become symptomatic at about the same time as the skin symptoms behind his ears, which is consistent with studies showing that PsA co-occurs with plaque psoriasis in 15% of patients and precedes plaque psoriasis diagnosis in 17% of patients. Environmental risk factors for PsA in genetically susceptible patients with plaque psoriasis include joint trauma, streptococcal infection, and certain antibiotics. Smoking appears to have a protective effect in PsA. PsA is more highly associated with severe plaque psoriasis than with mild plaque psoriasis.

PsA has a heterogeneous presentation, which may challenge diagnosis. It is classified by the degree of joint involvement as oligoarticular (four or fewer joints) or polyarticular (five or more joints). Radiographically, there are five main types of PsA, one of which is predominant involvement of the distal interphalangeal joint (DIP) joints — the form seen in this patient. The other four types of PsA are symmetrical peripheral polyarthritis, asymmetrical mono- or oligoarthritis, axial spondyloarthropathy, and arthritis mutilans. DIP joint involvement with proliferative bone changes suggests a diagnosis of PsA over rheumatoid arthritis.

PsA is diagnosed using radiography, skin biopsy of affected skin areas, and complete blood and metabolic assessments. With advanced PsA, radiographs typically reveal bone destruction and disease-related bone formation (juxta-articular bone formation), resulting in erosions, joint destruction, and joint-space narrowing. Juxta-articular bone formation (presenting poorly defined ossification adjacent to the joint margin) is often the earliest radiographic clue before erosions may occur. Enthesitis in multiple entheses is typical of PsA vs osteoarthritis or mechanical injury. There are no specific tests to confirm PsA. Patients with PsA usually are rheumatoid factor negative. Inflammatory biomarkers, such as C-reactive protein and erythrocyte sedimentation rate, are elevated in about 40% of patients with PsA. 

In addition to plaques, extra-articular manifestations of PsA may include nail changes and chronic bilateral ocular disease. PsA is an articular manifestation of psoriasis but is still a systemic disease with deleterious effects on cardiometabolic factors; increased mortality with myocardial infarction; and possible involvement of other immune-mediated diseases, such as inflammatory bowel disease, that share a common pathway of tumor necrosis factor (TNF) alpha overexpression. 

Early treatment with disease-modifying drugs plus nonpharmacologic interventions is crucial to minimizing disability progression and optimizing patients' quality of life. Nonpharmacologic interventions include physical and occupational therapy and exercise. Symptomatic therapies (nonsteroidal anti-inflammatory drugs or steroids) can be used to relieve mild symptoms. Assessment for cardiometabolic, renal, and other systemic impacts of PsA is essential. 

Biologic therapies are key to preventing disease progression. The most broadly targeted are the TNF-alpha inhibitors, which are commonly recommended as first-line therapy in moderate to severe PsA or in patients with radiographic damage. The interleukin (IL)-17 inhibitors ixekizumab and secukinumab and the IL-12/23 inhibitor ustekinumab have targets downstream of TNF-alpha. Treatment options also include oral small molecule inhibitors of phosphodiesterase 4 (apremilast) or Janus kinase (tofacitinib, upadacitinib). Recognition of the role of IL-23 as a key cytokine in PsA development through promotion of Th17 differentiation has led to availability of drugs specifically targeting IL-23(p19) (guselkumab, tildrakizumab, and risankizumab). All have been studied, but only guselkumab and risankizumab currently are approved for treatment of PsA. Each class of drugs has specific benefits and risks, which should be discussed with patients before treatment initiation. Patient comorbidities should also be considered in choosing treatment. 

Herbert S. Diamond, MD, Professor of Medicine (retired), Temple University School of Medicine, University of Pittsburgh; Chairman, Department of Medicine Emeritus, Western Pennsylvania Hospital, Pittsburgh, PA.

Herbert S. Diamond, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

Psoriatic arthritis (PsA) is an immune-mediated arthritis that is almost always associated with plaque psoriasis. PsA is diagnosed in about 20% of patients with plaque psoriasis, and, in most patients, a diagnosis of plaque psoriasis precedes PsA development. However, in this patient, PsA appears to have become symptomatic at about the same time as the skin symptoms behind his ears, which is consistent with studies showing that PsA co-occurs with plaque psoriasis in 15% of patients and precedes plaque psoriasis diagnosis in 17% of patients. Environmental risk factors for PsA in genetically susceptible patients with plaque psoriasis include joint trauma, streptococcal infection, and certain antibiotics. Smoking appears to have a protective effect in PsA. PsA is more highly associated with severe plaque psoriasis than with mild plaque psoriasis.

PsA has a heterogeneous presentation, which may challenge diagnosis. It is classified by the degree of joint involvement as oligoarticular (four or fewer joints) or polyarticular (five or more joints). Radiographically, there are five main types of PsA, one of which is predominant involvement of the distal interphalangeal joint (DIP) joints — the form seen in this patient. The other four types of PsA are symmetrical peripheral polyarthritis, asymmetrical mono- or oligoarthritis, axial spondyloarthropathy, and arthritis mutilans. DIP joint involvement with proliferative bone changes suggests a diagnosis of PsA over rheumatoid arthritis.

PsA is diagnosed using radiography, skin biopsy of affected skin areas, and complete blood and metabolic assessments. With advanced PsA, radiographs typically reveal bone destruction and disease-related bone formation (juxta-articular bone formation), resulting in erosions, joint destruction, and joint-space narrowing. Juxta-articular bone formation (presenting poorly defined ossification adjacent to the joint margin) is often the earliest radiographic clue before erosions may occur. Enthesitis in multiple entheses is typical of PsA vs osteoarthritis or mechanical injury. There are no specific tests to confirm PsA. Patients with PsA usually are rheumatoid factor negative. Inflammatory biomarkers, such as C-reactive protein and erythrocyte sedimentation rate, are elevated in about 40% of patients with PsA. 

In addition to plaques, extra-articular manifestations of PsA may include nail changes and chronic bilateral ocular disease. PsA is an articular manifestation of psoriasis but is still a systemic disease with deleterious effects on cardiometabolic factors; increased mortality with myocardial infarction; and possible involvement of other immune-mediated diseases, such as inflammatory bowel disease, that share a common pathway of tumor necrosis factor (TNF) alpha overexpression. 

Early treatment with disease-modifying drugs plus nonpharmacologic interventions is crucial to minimizing disability progression and optimizing patients' quality of life. Nonpharmacologic interventions include physical and occupational therapy and exercise. Symptomatic therapies (nonsteroidal anti-inflammatory drugs or steroids) can be used to relieve mild symptoms. Assessment for cardiometabolic, renal, and other systemic impacts of PsA is essential. 

Biologic therapies are key to preventing disease progression. The most broadly targeted are the TNF-alpha inhibitors, which are commonly recommended as first-line therapy in moderate to severe PsA or in patients with radiographic damage. The interleukin (IL)-17 inhibitors ixekizumab and secukinumab and the IL-12/23 inhibitor ustekinumab have targets downstream of TNF-alpha. Treatment options also include oral small molecule inhibitors of phosphodiesterase 4 (apremilast) or Janus kinase (tofacitinib, upadacitinib). Recognition of the role of IL-23 as a key cytokine in PsA development through promotion of Th17 differentiation has led to availability of drugs specifically targeting IL-23(p19) (guselkumab, tildrakizumab, and risankizumab). All have been studied, but only guselkumab and risankizumab currently are approved for treatment of PsA. Each class of drugs has specific benefits and risks, which should be discussed with patients before treatment initiation. Patient comorbidities should also be considered in choosing treatment. 

Herbert S. Diamond, MD, Professor of Medicine (retired), Temple University School of Medicine, University of Pittsburgh; Chairman, Department of Medicine Emeritus, Western Pennsylvania Hospital, Pittsburgh, PA.

Herbert S. Diamond, MD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.