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Nonhealing Ulcer in a Patient With Crohn Disease

The Diagnosis: Mycobacterium abscessus Infection

Upon further testing, cultures were positive for Mycobacterium abscessus. Our patient was referred to infectious disease for co-management, and his treatment plan consisted of intravenous amikacin 885 mg 3 times weekly, intravenous imipenem 1 g twice daily, azithromycin 500 mg/d, and omadacycline 150 mg/d for at least 3 months. Magnetic resonance imaging findings were consistent with a combination of cellulitis and osteomyelitis, and our patient was referred to plastic surgery for debridement. He subsequently was lost to follow-up.

Mycobacterium abscessus is classified as both a nontuberculous and rapidly growing mycobacterium. Mycobacterium abscessus recently has emerged as a pathogen of increasing public health concern, especially due to its high rate of antibiotic resistance.1-5 It is highly prevalent in the environment, and infection has been reported from a wide variety of environmental sources.6-8 Immunocompromised individuals, such as our patient, undergoing anti–tumor necrosis factor therapy are at increased risk for infection from all Mycobacterium species.9-11 Recognizing these infections quickly is a priority for patient care, as M abscessus can lead to disseminated infection and high mortality rates.1

Histopathology of M abscessus consists of granulomatous inflammation with mixed granulomas12; however, these findings are not always appreciable, and staining does not always reveal visible organisms. In our patient, histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue, which are signs of generalized inflammation (Figure). Therefore, cultures positive for M abscessus are the gold standard for diagnosis and established the diagnosis in this case.

Histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue (H&E, original magnifications ×40 and ×200).
A and B, Histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue (H&E, original magnifications ×40 and ×200).

The differential diagnoses for our patient’s ulceration included squamous cell carcinoma, pyoderma gangrenosum, aseptic abscess ulcer, and pyodermatitispyostomatitis vegetans. Immunosuppressive therapy is a risk factor for squamous cell carcinoma13,14; however, ulcerated squamous cell carcinoma typically presents with prominent everted edges with a necrotic tumor base.15 Biopsy reveals cells with abundant eosinophilic cytoplasm, large nuclei, and variable keratin pearls.16 Pyoderma gangrenosum is an inflammatory skin condition associated with Crohn disease and often is a diagnosis of exclusion characterized by neutrophilic infiltrates on biopsy.17-19 Aseptic abscess ulcers are characterized by neutrophil-filled lesions that respond to corticosteroids but not antibiotics.20 Pyodermatitis-pyostomatitis vegetans is a rare skin manifestation of inflammatory bowel disease associated with a pustular eruption of the skin and/or mouth. Histopathology reveals pustules within or below the epidermis with many eosinophils or neutrophils. Granulomas do not occur as in M abscessus.21

Treatment of M abscessus infection requires the coadministration of several antibiotics across multiple classes to ensure complete disease resolution. High rates of antibiotic resistance are characterized by at least partial resistance to almost every antibiotic; clarithromycin has near-complete efficacy, but resistant strains have started to emerge. Amikacin and cefoxitin are other antibiotics that have reported a resistance rate of less than 50%, but they are only effective 90% and 70% of the time, respectively.1,22 The antibiotic omadacycline, which is approved by the US Food and Drug Administration to treat acute bacterial skin and soft-tissue infections, also may have utility in treating M abscessus infections.23,24 Finally, phage therapy may offer a potential mode of treatment for this bacterium and was used to treat pulmonary infection in a patient with cystic fibrosis.25 Despite these newer innovations, the current standard of care involves clarithromycin or azithromycin in combination with a parenteral antibiotic such as cefoxitin, amikacin, or imipenem for at least 4 months.1

References
  1. Griffith DE, Aksamit T, Brown-Elliott BA, et al. An official ATS/IDSA statement: diagnosis, treatment, and prevention of nontuberculous mycobacterial diseases. Am J Respir Crit Care Med. 2007;175:367-416.
  2. Jeong SH, Kim SY, Huh HJ, et al. Mycobacteriological characteristics and treatment outcomes in extrapulmonary Mycobacterium abscessus complex infections. Int J Infect Dis. 2017;60:49-56.
  3. Strnad L, Winthrop KL. Treatment of Mycobacterium abscessus complex. Semin Respir Crit Care Med. 2018;39:362-376.
  4. Cardenas DD, Yasmin T, Ahmed S. A rare insidious case of skin and soft tissue infection due to Mycobacterium abscessus: a case report. Cureus. 2022;14:E25725.
  5. Gonzalez-Santiago TM, Drage LA. Nontuberculous mycobacteria: skin and soft tissue infections. Dermatol Clin. 2015;33:563-577.
  6. Dickison P, Howard V, O’Kane G, et al. Mycobacterium abscessus infection following penetrations through wetsuits. Australas J Dermatol. 2019;60:57-59.
  7. Choi H, Kim YI, Na CH, et al. Mycobacterium abscessus skin infection associated with shaving activity in a 75-year-old man. Ann Geriatr Med Res. 2018;22:204.
  8. Costa-Silva M, Cesar A, Gomes NP, et al. Mycobacterium abscessus infection in a spa worker. Acta Dermatovenerol Alp Pannonica Adriat. 2018;27:159-161.
  9. Besada E. Rapid growing mycobacteria and TNF-α blockers: case report of a fatal lung infection with Mycobacterium abscessus. Clin Exp Rheumatol. 2011;29:705-707.
  10. Mufti AH, Toye BW, Mckendry RR, et al. Mycobacterium abscessus infection after use of tumor necrosis factor α inhibitor therapy: case report and review of infectious complications associated with tumor necrosis factor α inhibitor use. Diagn Microbiol Infect Dis. 2005;53:233-238.
  11. Lee SK, Kim SY, Kim EY, et al. Mycobacterial infections in patients treated with tumor necrosis factor antagonists in South Korea. Lung. 2013;191:565-571.
  12. Rodríguez G, Ortegón M, Camargo D, et al. Iatrogenic Mycobacterium abscessus infection: histopathology of 71 patients. Br J Dermatol. 1997;137:214-218.
  13. Firnhaber JM. Diagnosis and treatment of basal cell and squamous cell carcinoma. Am Fam Physician. 2012;86:161-168.
  14. Walker HS, Hardwicke J. Non-melanoma skin cancer. Surgery (Oxford). 2022;40:39-45.
  15. Browse NL. The skin. In: Browse NL, ed. An Introduction to the Symptoms and Signs of Surgical Disease. 3rd ed. London Arnold Publications; 2001:66-69.
  16. Weedon D. Squamous cell carcinoma. Weedon’s Skin Pathology. 3rd ed. Churchill Livingstone Elsevier; 2010;691-700.
  17. Powell F, Schroeter A, Su W, et al. Pyoderma gangrenosum: a review of 86 patients. QJM Int J Med. 1985;55:173-186.
  18. Brunsting LA, Goeckerman WH, O’Leary PA. Pyoderma (ecthyma) gangrenosum: clinical and experimental observations in five cases occurring in adults. Arch Dermatol. 1982;118:743-768.
  19. Maverakis E, Ma C, Shinkai K, et al. Diagnostic criteria of ulcerative pyoderma gangrenosum: a Delphi consensus of international experts. JAMA Dermatol. 2018;154:461-466.
  20. André MFJ, Piette JC, Kémény JL, et al. Aseptic abscesses: a study of 30 patients with or without inflammatory bowel disease and review of the literature. Medicine (Baltimore). 2007;86:145. doi:10.1097/md.0b013e18064f9f3
  21. Femiano F, Lanza A, Buonaiuto C, et al. Pyostomatitis vegetans: a review of the literature. Med Oral Patol Oral Cir Bucal. 2009;14:E114-E117.
  22. Kasperbauer SH, De Groote MA. The treatment of rapidly growing mycobacterial infections. Clin Chest Med. 2015;36:67-78.
  23. Duah M, Beshay M. Omadacycline in first-line combination therapy for pulmonary Mycobacterium abscessus infection: a case series. Int J Infect Dis. 2022;122:953-956.
  24. Minhas R, Sharma S, Kundu S. Utilizing the promise of omadacycline in a resistant, non-tubercular mycobacterial pulmonary infection. Cureus. 2019;11:E5112.
  25. Dedrick RM, Guerrero-Bustamante CA, Garlena RA, et al. Engineered bacteriophages for treatment of a patient with a disseminated drug-resistant Mycobacterium abscessus. Nat Med. 2019;25:730-733.
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Drs. Javdan and Wassef and Siddharth Marwaha are from the Department of Dermatology, Rutgers Robert Wood Johnson Medical School, Somerset, New Jersey. Dr. Ali is from the Department of Pathology, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey.

The authors report no conflict of interest.

Correspondence: Bahar Javdan, PhD, Rutgers Robert Wood Johnson Medical School, Rutgers Center for Dermatology, 1 Worlds Fair Dr, Somerset, NJ 08873 (bj186@rwjms.rutgers.edu).

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Drs. Javdan and Wassef and Siddharth Marwaha are from the Department of Dermatology, Rutgers Robert Wood Johnson Medical School, Somerset, New Jersey. Dr. Ali is from the Department of Pathology, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey.

The authors report no conflict of interest.

Correspondence: Bahar Javdan, PhD, Rutgers Robert Wood Johnson Medical School, Rutgers Center for Dermatology, 1 Worlds Fair Dr, Somerset, NJ 08873 (bj186@rwjms.rutgers.edu).

Author and Disclosure Information

Drs. Javdan and Wassef and Siddharth Marwaha are from the Department of Dermatology, Rutgers Robert Wood Johnson Medical School, Somerset, New Jersey. Dr. Ali is from the Department of Pathology, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey.

The authors report no conflict of interest.

Correspondence: Bahar Javdan, PhD, Rutgers Robert Wood Johnson Medical School, Rutgers Center for Dermatology, 1 Worlds Fair Dr, Somerset, NJ 08873 (bj186@rwjms.rutgers.edu).

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The Diagnosis: Mycobacterium abscessus Infection

Upon further testing, cultures were positive for Mycobacterium abscessus. Our patient was referred to infectious disease for co-management, and his treatment plan consisted of intravenous amikacin 885 mg 3 times weekly, intravenous imipenem 1 g twice daily, azithromycin 500 mg/d, and omadacycline 150 mg/d for at least 3 months. Magnetic resonance imaging findings were consistent with a combination of cellulitis and osteomyelitis, and our patient was referred to plastic surgery for debridement. He subsequently was lost to follow-up.

Mycobacterium abscessus is classified as both a nontuberculous and rapidly growing mycobacterium. Mycobacterium abscessus recently has emerged as a pathogen of increasing public health concern, especially due to its high rate of antibiotic resistance.1-5 It is highly prevalent in the environment, and infection has been reported from a wide variety of environmental sources.6-8 Immunocompromised individuals, such as our patient, undergoing anti–tumor necrosis factor therapy are at increased risk for infection from all Mycobacterium species.9-11 Recognizing these infections quickly is a priority for patient care, as M abscessus can lead to disseminated infection and high mortality rates.1

Histopathology of M abscessus consists of granulomatous inflammation with mixed granulomas12; however, these findings are not always appreciable, and staining does not always reveal visible organisms. In our patient, histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue, which are signs of generalized inflammation (Figure). Therefore, cultures positive for M abscessus are the gold standard for diagnosis and established the diagnosis in this case.

Histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue (H&E, original magnifications ×40 and ×200).
A and B, Histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue (H&E, original magnifications ×40 and ×200).

The differential diagnoses for our patient’s ulceration included squamous cell carcinoma, pyoderma gangrenosum, aseptic abscess ulcer, and pyodermatitispyostomatitis vegetans. Immunosuppressive therapy is a risk factor for squamous cell carcinoma13,14; however, ulcerated squamous cell carcinoma typically presents with prominent everted edges with a necrotic tumor base.15 Biopsy reveals cells with abundant eosinophilic cytoplasm, large nuclei, and variable keratin pearls.16 Pyoderma gangrenosum is an inflammatory skin condition associated with Crohn disease and often is a diagnosis of exclusion characterized by neutrophilic infiltrates on biopsy.17-19 Aseptic abscess ulcers are characterized by neutrophil-filled lesions that respond to corticosteroids but not antibiotics.20 Pyodermatitis-pyostomatitis vegetans is a rare skin manifestation of inflammatory bowel disease associated with a pustular eruption of the skin and/or mouth. Histopathology reveals pustules within or below the epidermis with many eosinophils or neutrophils. Granulomas do not occur as in M abscessus.21

Treatment of M abscessus infection requires the coadministration of several antibiotics across multiple classes to ensure complete disease resolution. High rates of antibiotic resistance are characterized by at least partial resistance to almost every antibiotic; clarithromycin has near-complete efficacy, but resistant strains have started to emerge. Amikacin and cefoxitin are other antibiotics that have reported a resistance rate of less than 50%, but they are only effective 90% and 70% of the time, respectively.1,22 The antibiotic omadacycline, which is approved by the US Food and Drug Administration to treat acute bacterial skin and soft-tissue infections, also may have utility in treating M abscessus infections.23,24 Finally, phage therapy may offer a potential mode of treatment for this bacterium and was used to treat pulmonary infection in a patient with cystic fibrosis.25 Despite these newer innovations, the current standard of care involves clarithromycin or azithromycin in combination with a parenteral antibiotic such as cefoxitin, amikacin, or imipenem for at least 4 months.1

The Diagnosis: Mycobacterium abscessus Infection

Upon further testing, cultures were positive for Mycobacterium abscessus. Our patient was referred to infectious disease for co-management, and his treatment plan consisted of intravenous amikacin 885 mg 3 times weekly, intravenous imipenem 1 g twice daily, azithromycin 500 mg/d, and omadacycline 150 mg/d for at least 3 months. Magnetic resonance imaging findings were consistent with a combination of cellulitis and osteomyelitis, and our patient was referred to plastic surgery for debridement. He subsequently was lost to follow-up.

Mycobacterium abscessus is classified as both a nontuberculous and rapidly growing mycobacterium. Mycobacterium abscessus recently has emerged as a pathogen of increasing public health concern, especially due to its high rate of antibiotic resistance.1-5 It is highly prevalent in the environment, and infection has been reported from a wide variety of environmental sources.6-8 Immunocompromised individuals, such as our patient, undergoing anti–tumor necrosis factor therapy are at increased risk for infection from all Mycobacterium species.9-11 Recognizing these infections quickly is a priority for patient care, as M abscessus can lead to disseminated infection and high mortality rates.1

Histopathology of M abscessus consists of granulomatous inflammation with mixed granulomas12; however, these findings are not always appreciable, and staining does not always reveal visible organisms. In our patient, histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue, which are signs of generalized inflammation (Figure). Therefore, cultures positive for M abscessus are the gold standard for diagnosis and established the diagnosis in this case.

Histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue (H&E, original magnifications ×40 and ×200).
A and B, Histopathology revealed patchy plasmalymphocytic infiltrates of the dermis and subcutaneous tissue (H&E, original magnifications ×40 and ×200).

The differential diagnoses for our patient’s ulceration included squamous cell carcinoma, pyoderma gangrenosum, aseptic abscess ulcer, and pyodermatitispyostomatitis vegetans. Immunosuppressive therapy is a risk factor for squamous cell carcinoma13,14; however, ulcerated squamous cell carcinoma typically presents with prominent everted edges with a necrotic tumor base.15 Biopsy reveals cells with abundant eosinophilic cytoplasm, large nuclei, and variable keratin pearls.16 Pyoderma gangrenosum is an inflammatory skin condition associated with Crohn disease and often is a diagnosis of exclusion characterized by neutrophilic infiltrates on biopsy.17-19 Aseptic abscess ulcers are characterized by neutrophil-filled lesions that respond to corticosteroids but not antibiotics.20 Pyodermatitis-pyostomatitis vegetans is a rare skin manifestation of inflammatory bowel disease associated with a pustular eruption of the skin and/or mouth. Histopathology reveals pustules within or below the epidermis with many eosinophils or neutrophils. Granulomas do not occur as in M abscessus.21

Treatment of M abscessus infection requires the coadministration of several antibiotics across multiple classes to ensure complete disease resolution. High rates of antibiotic resistance are characterized by at least partial resistance to almost every antibiotic; clarithromycin has near-complete efficacy, but resistant strains have started to emerge. Amikacin and cefoxitin are other antibiotics that have reported a resistance rate of less than 50%, but they are only effective 90% and 70% of the time, respectively.1,22 The antibiotic omadacycline, which is approved by the US Food and Drug Administration to treat acute bacterial skin and soft-tissue infections, also may have utility in treating M abscessus infections.23,24 Finally, phage therapy may offer a potential mode of treatment for this bacterium and was used to treat pulmonary infection in a patient with cystic fibrosis.25 Despite these newer innovations, the current standard of care involves clarithromycin or azithromycin in combination with a parenteral antibiotic such as cefoxitin, amikacin, or imipenem for at least 4 months.1

References
  1. Griffith DE, Aksamit T, Brown-Elliott BA, et al. An official ATS/IDSA statement: diagnosis, treatment, and prevention of nontuberculous mycobacterial diseases. Am J Respir Crit Care Med. 2007;175:367-416.
  2. Jeong SH, Kim SY, Huh HJ, et al. Mycobacteriological characteristics and treatment outcomes in extrapulmonary Mycobacterium abscessus complex infections. Int J Infect Dis. 2017;60:49-56.
  3. Strnad L, Winthrop KL. Treatment of Mycobacterium abscessus complex. Semin Respir Crit Care Med. 2018;39:362-376.
  4. Cardenas DD, Yasmin T, Ahmed S. A rare insidious case of skin and soft tissue infection due to Mycobacterium abscessus: a case report. Cureus. 2022;14:E25725.
  5. Gonzalez-Santiago TM, Drage LA. Nontuberculous mycobacteria: skin and soft tissue infections. Dermatol Clin. 2015;33:563-577.
  6. Dickison P, Howard V, O’Kane G, et al. Mycobacterium abscessus infection following penetrations through wetsuits. Australas J Dermatol. 2019;60:57-59.
  7. Choi H, Kim YI, Na CH, et al. Mycobacterium abscessus skin infection associated with shaving activity in a 75-year-old man. Ann Geriatr Med Res. 2018;22:204.
  8. Costa-Silva M, Cesar A, Gomes NP, et al. Mycobacterium abscessus infection in a spa worker. Acta Dermatovenerol Alp Pannonica Adriat. 2018;27:159-161.
  9. Besada E. Rapid growing mycobacteria and TNF-α blockers: case report of a fatal lung infection with Mycobacterium abscessus. Clin Exp Rheumatol. 2011;29:705-707.
  10. Mufti AH, Toye BW, Mckendry RR, et al. Mycobacterium abscessus infection after use of tumor necrosis factor α inhibitor therapy: case report and review of infectious complications associated with tumor necrosis factor α inhibitor use. Diagn Microbiol Infect Dis. 2005;53:233-238.
  11. Lee SK, Kim SY, Kim EY, et al. Mycobacterial infections in patients treated with tumor necrosis factor antagonists in South Korea. Lung. 2013;191:565-571.
  12. Rodríguez G, Ortegón M, Camargo D, et al. Iatrogenic Mycobacterium abscessus infection: histopathology of 71 patients. Br J Dermatol. 1997;137:214-218.
  13. Firnhaber JM. Diagnosis and treatment of basal cell and squamous cell carcinoma. Am Fam Physician. 2012;86:161-168.
  14. Walker HS, Hardwicke J. Non-melanoma skin cancer. Surgery (Oxford). 2022;40:39-45.
  15. Browse NL. The skin. In: Browse NL, ed. An Introduction to the Symptoms and Signs of Surgical Disease. 3rd ed. London Arnold Publications; 2001:66-69.
  16. Weedon D. Squamous cell carcinoma. Weedon’s Skin Pathology. 3rd ed. Churchill Livingstone Elsevier; 2010;691-700.
  17. Powell F, Schroeter A, Su W, et al. Pyoderma gangrenosum: a review of 86 patients. QJM Int J Med. 1985;55:173-186.
  18. Brunsting LA, Goeckerman WH, O’Leary PA. Pyoderma (ecthyma) gangrenosum: clinical and experimental observations in five cases occurring in adults. Arch Dermatol. 1982;118:743-768.
  19. Maverakis E, Ma C, Shinkai K, et al. Diagnostic criteria of ulcerative pyoderma gangrenosum: a Delphi consensus of international experts. JAMA Dermatol. 2018;154:461-466.
  20. André MFJ, Piette JC, Kémény JL, et al. Aseptic abscesses: a study of 30 patients with or without inflammatory bowel disease and review of the literature. Medicine (Baltimore). 2007;86:145. doi:10.1097/md.0b013e18064f9f3
  21. Femiano F, Lanza A, Buonaiuto C, et al. Pyostomatitis vegetans: a review of the literature. Med Oral Patol Oral Cir Bucal. 2009;14:E114-E117.
  22. Kasperbauer SH, De Groote MA. The treatment of rapidly growing mycobacterial infections. Clin Chest Med. 2015;36:67-78.
  23. Duah M, Beshay M. Omadacycline in first-line combination therapy for pulmonary Mycobacterium abscessus infection: a case series. Int J Infect Dis. 2022;122:953-956.
  24. Minhas R, Sharma S, Kundu S. Utilizing the promise of omadacycline in a resistant, non-tubercular mycobacterial pulmonary infection. Cureus. 2019;11:E5112.
  25. Dedrick RM, Guerrero-Bustamante CA, Garlena RA, et al. Engineered bacteriophages for treatment of a patient with a disseminated drug-resistant Mycobacterium abscessus. Nat Med. 2019;25:730-733.
References
  1. Griffith DE, Aksamit T, Brown-Elliott BA, et al. An official ATS/IDSA statement: diagnosis, treatment, and prevention of nontuberculous mycobacterial diseases. Am J Respir Crit Care Med. 2007;175:367-416.
  2. Jeong SH, Kim SY, Huh HJ, et al. Mycobacteriological characteristics and treatment outcomes in extrapulmonary Mycobacterium abscessus complex infections. Int J Infect Dis. 2017;60:49-56.
  3. Strnad L, Winthrop KL. Treatment of Mycobacterium abscessus complex. Semin Respir Crit Care Med. 2018;39:362-376.
  4. Cardenas DD, Yasmin T, Ahmed S. A rare insidious case of skin and soft tissue infection due to Mycobacterium abscessus: a case report. Cureus. 2022;14:E25725.
  5. Gonzalez-Santiago TM, Drage LA. Nontuberculous mycobacteria: skin and soft tissue infections. Dermatol Clin. 2015;33:563-577.
  6. Dickison P, Howard V, O’Kane G, et al. Mycobacterium abscessus infection following penetrations through wetsuits. Australas J Dermatol. 2019;60:57-59.
  7. Choi H, Kim YI, Na CH, et al. Mycobacterium abscessus skin infection associated with shaving activity in a 75-year-old man. Ann Geriatr Med Res. 2018;22:204.
  8. Costa-Silva M, Cesar A, Gomes NP, et al. Mycobacterium abscessus infection in a spa worker. Acta Dermatovenerol Alp Pannonica Adriat. 2018;27:159-161.
  9. Besada E. Rapid growing mycobacteria and TNF-α blockers: case report of a fatal lung infection with Mycobacterium abscessus. Clin Exp Rheumatol. 2011;29:705-707.
  10. Mufti AH, Toye BW, Mckendry RR, et al. Mycobacterium abscessus infection after use of tumor necrosis factor α inhibitor therapy: case report and review of infectious complications associated with tumor necrosis factor α inhibitor use. Diagn Microbiol Infect Dis. 2005;53:233-238.
  11. Lee SK, Kim SY, Kim EY, et al. Mycobacterial infections in patients treated with tumor necrosis factor antagonists in South Korea. Lung. 2013;191:565-571.
  12. Rodríguez G, Ortegón M, Camargo D, et al. Iatrogenic Mycobacterium abscessus infection: histopathology of 71 patients. Br J Dermatol. 1997;137:214-218.
  13. Firnhaber JM. Diagnosis and treatment of basal cell and squamous cell carcinoma. Am Fam Physician. 2012;86:161-168.
  14. Walker HS, Hardwicke J. Non-melanoma skin cancer. Surgery (Oxford). 2022;40:39-45.
  15. Browse NL. The skin. In: Browse NL, ed. An Introduction to the Symptoms and Signs of Surgical Disease. 3rd ed. London Arnold Publications; 2001:66-69.
  16. Weedon D. Squamous cell carcinoma. Weedon’s Skin Pathology. 3rd ed. Churchill Livingstone Elsevier; 2010;691-700.
  17. Powell F, Schroeter A, Su W, et al. Pyoderma gangrenosum: a review of 86 patients. QJM Int J Med. 1985;55:173-186.
  18. Brunsting LA, Goeckerman WH, O’Leary PA. Pyoderma (ecthyma) gangrenosum: clinical and experimental observations in five cases occurring in adults. Arch Dermatol. 1982;118:743-768.
  19. Maverakis E, Ma C, Shinkai K, et al. Diagnostic criteria of ulcerative pyoderma gangrenosum: a Delphi consensus of international experts. JAMA Dermatol. 2018;154:461-466.
  20. André MFJ, Piette JC, Kémény JL, et al. Aseptic abscesses: a study of 30 patients with or without inflammatory bowel disease and review of the literature. Medicine (Baltimore). 2007;86:145. doi:10.1097/md.0b013e18064f9f3
  21. Femiano F, Lanza A, Buonaiuto C, et al. Pyostomatitis vegetans: a review of the literature. Med Oral Patol Oral Cir Bucal. 2009;14:E114-E117.
  22. Kasperbauer SH, De Groote MA. The treatment of rapidly growing mycobacterial infections. Clin Chest Med. 2015;36:67-78.
  23. Duah M, Beshay M. Omadacycline in first-line combination therapy for pulmonary Mycobacterium abscessus infection: a case series. Int J Infect Dis. 2022;122:953-956.
  24. Minhas R, Sharma S, Kundu S. Utilizing the promise of omadacycline in a resistant, non-tubercular mycobacterial pulmonary infection. Cureus. 2019;11:E5112.
  25. Dedrick RM, Guerrero-Bustamante CA, Garlena RA, et al. Engineered bacteriophages for treatment of a patient with a disseminated drug-resistant Mycobacterium abscessus. Nat Med. 2019;25:730-733.
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A 24-year-old man presented to our dermatology clinic with a painful lesion on the right buccal cheek of 4 months’ duration that had not changed in size or appearance. He had a history of Crohn disease that was being treated with 6-mercaptopurine and infliximab. He underwent jaw surgery 7 years prior for correction of an underbite, followed by subsequent surgery to remove the hardware 1 year after the initial procedure. He experienced recurring skin abscesses following the initial jaw surgery roughly once a year that were treated with bedside incision and drainage procedures in the emergency department followed by trimethoprim-sulfamethoxazole with complete resolution; however, treatment with mupirocin ointment 2%, trimethoprim-sulfamethoxazole, and azithromycin did not provide symptomatic relief or resolution for the current lesion. Physical examination revealed a 4-cm ulceration with actively draining serosanguineous discharge. Two punch biopsies were performed; 48-hour bacterial and fungal cultures, as well as Giemsa, acid-fast bacilli, and periodic acid–Schiff staining were negative.

Nonhealing ulcer

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