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Clinical Characteristics and Outcomes of Tall Cell Carcinoma with Reversed Polarity
Background
Tall cell carcinoma with reversed polarity (TCCRP) is a rare and distinct subtype of invasive breast carcinoma, defined by tall columnar cells with eosinophilic cytoplasm and reversed nuclear polarity. TCCRP remains poorly characterized in the literature, with limited population-level evidence to guide management and prognostication. This study uses the National Cancer Database (NCDB) to examine the epidemiology, clinical features, and outcomes of this neoplasm.
Methods
A retrospective cohort analysis included 951 patients diagnosed with TCCRP (ICD-O-3 code 8509) from 2018–2020 using the NCDB. Demographic and treatment variables were analyzed using descriptive statistics. Incidence trends were assessed using linear regression, and overall survival was evaluated using Kaplan-Meier methods.
Results
Most patients were female (98.1%) with a mean age of 69.1 years. The majority were White (82.0%), followed by Black (9.0%) and Hispanic (8.7%). Primary tumor sites included overlapping breast lesions (28.5%) and the upper-inner quadrant (27.0%). Incidence remained stable (R2 = 0.0). Most patients were diagnosed at Stage I (58.4%) and had a Charlson-Deyo score of 0 (76.2%). Socioeconomically, 41.8% lived in the highest income quartile (≥$74,063), and most had Medicare (64.7%). The most common treatment settings were comprehensive community cancer programs (40.3%). Surgery was performed in 95.6% of cases, with negative margins in 91.1%. Radiation therapy (46.6%) and hormone therapy (44.3%) were frequently used. Mortality was 1.1% at 30 days and 1.7% at 90 days. Survival was 98.9% at 2 years, 97.3% at 5 years, and 94.5% at 10 years, with a mean survival of 46.4 months.
Conclusions
This is the first NCDB-based study of TCCRP, highlighting favorable outcomes and distinct clinicodemographic features. Patients were predominantly older, White, and Medicare-insured, often receiving care at community cancer programs. These findings suggest that socioeconomic factors may influence access and treatment. Results may inform strategies to promote equitable care delivery across health systems and guide further research on clinical management and survivorship in TCCRP, particularly for rare cancers within community-based settings such as the VHA.
Background
Tall cell carcinoma with reversed polarity (TCCRP) is a rare and distinct subtype of invasive breast carcinoma, defined by tall columnar cells with eosinophilic cytoplasm and reversed nuclear polarity. TCCRP remains poorly characterized in the literature, with limited population-level evidence to guide management and prognostication. This study uses the National Cancer Database (NCDB) to examine the epidemiology, clinical features, and outcomes of this neoplasm.
Methods
A retrospective cohort analysis included 951 patients diagnosed with TCCRP (ICD-O-3 code 8509) from 2018–2020 using the NCDB. Demographic and treatment variables were analyzed using descriptive statistics. Incidence trends were assessed using linear regression, and overall survival was evaluated using Kaplan-Meier methods.
Results
Most patients were female (98.1%) with a mean age of 69.1 years. The majority were White (82.0%), followed by Black (9.0%) and Hispanic (8.7%). Primary tumor sites included overlapping breast lesions (28.5%) and the upper-inner quadrant (27.0%). Incidence remained stable (R2 = 0.0). Most patients were diagnosed at Stage I (58.4%) and had a Charlson-Deyo score of 0 (76.2%). Socioeconomically, 41.8% lived in the highest income quartile (≥$74,063), and most had Medicare (64.7%). The most common treatment settings were comprehensive community cancer programs (40.3%). Surgery was performed in 95.6% of cases, with negative margins in 91.1%. Radiation therapy (46.6%) and hormone therapy (44.3%) were frequently used. Mortality was 1.1% at 30 days and 1.7% at 90 days. Survival was 98.9% at 2 years, 97.3% at 5 years, and 94.5% at 10 years, with a mean survival of 46.4 months.
Conclusions
This is the first NCDB-based study of TCCRP, highlighting favorable outcomes and distinct clinicodemographic features. Patients were predominantly older, White, and Medicare-insured, often receiving care at community cancer programs. These findings suggest that socioeconomic factors may influence access and treatment. Results may inform strategies to promote equitable care delivery across health systems and guide further research on clinical management and survivorship in TCCRP, particularly for rare cancers within community-based settings such as the VHA.
Background
Tall cell carcinoma with reversed polarity (TCCRP) is a rare and distinct subtype of invasive breast carcinoma, defined by tall columnar cells with eosinophilic cytoplasm and reversed nuclear polarity. TCCRP remains poorly characterized in the literature, with limited population-level evidence to guide management and prognostication. This study uses the National Cancer Database (NCDB) to examine the epidemiology, clinical features, and outcomes of this neoplasm.
Methods
A retrospective cohort analysis included 951 patients diagnosed with TCCRP (ICD-O-3 code 8509) from 2018–2020 using the NCDB. Demographic and treatment variables were analyzed using descriptive statistics. Incidence trends were assessed using linear regression, and overall survival was evaluated using Kaplan-Meier methods.
Results
Most patients were female (98.1%) with a mean age of 69.1 years. The majority were White (82.0%), followed by Black (9.0%) and Hispanic (8.7%). Primary tumor sites included overlapping breast lesions (28.5%) and the upper-inner quadrant (27.0%). Incidence remained stable (R2 = 0.0). Most patients were diagnosed at Stage I (58.4%) and had a Charlson-Deyo score of 0 (76.2%). Socioeconomically, 41.8% lived in the highest income quartile (≥$74,063), and most had Medicare (64.7%). The most common treatment settings were comprehensive community cancer programs (40.3%). Surgery was performed in 95.6% of cases, with negative margins in 91.1%. Radiation therapy (46.6%) and hormone therapy (44.3%) were frequently used. Mortality was 1.1% at 30 days and 1.7% at 90 days. Survival was 98.9% at 2 years, 97.3% at 5 years, and 94.5% at 10 years, with a mean survival of 46.4 months.
Conclusions
This is the first NCDB-based study of TCCRP, highlighting favorable outcomes and distinct clinicodemographic features. Patients were predominantly older, White, and Medicare-insured, often receiving care at community cancer programs. These findings suggest that socioeconomic factors may influence access and treatment. Results may inform strategies to promote equitable care delivery across health systems and guide further research on clinical management and survivorship in TCCRP, particularly for rare cancers within community-based settings such as the VHA.