US Incidence of Breast Cancer Subtypes Defined by Joint Hormone Receptor and HER2 Status
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ID: 295022
2014
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Abstract
In 2010, Surveillance, Epidemiology, and End Results (SEER) registries began collecting human epidermal growth factor 2 (HER2) receptor status for breast cancer cases. Breast cancer subtypes defined by joint hormone receptor (HR; estrogen receptor [ER] and progesterone receptor [PR]) and HER2 status were assessed across the 28% of the US population that is covered by SEER registries. Age-specific incidence rates by subtype were calculated for non-Hispanic (NH) white, NH black, NH Asian Pacific Islander (API), and Hispanic women. Joint HR/HER2 status distributions by age, race/ethnicity, county-level poverty, registry, stage, Bloom–Richardson grade, tumor size, and nodal status were evaluated using multivariable adjusted polytomous logistic regression. All statistical tests were two-sided. Among case patients with known HR/HER2 status, 36810 (72.7%) were found to be HR+/HER2−, 6193 (12.2%) were triple-negative (HR−/HER2−), 5240 (10.3%) were HR+/HER2+, and 2328 (4.6%) were HR−/HER2+; 6912 (12%) had unknown HR/HER2 status. NH white women had the highest incidence rate of the HR+/HER2− subtype, and NH black women had the highest rate of the triple-negative subtype. Compared with women with the HR+/HER2− subtype, triple-negative patients were more likely to be NH black and Hispanic; HR+/HER2+ patients were more likely to be NH API; and HR−/HER2+ patients were more likely to be NH black, NH API, and Hispanic. Patients with triple-negative, HR+/HER2+, and HR−/HER2+ breast cancer were 10% to 30% less likely to be diagnosed at older ages compared with HR+/HER2− patients and 6.4-fold to 20.0-fold more likely to present with high-grade disease. In the future, SEER data can be used to monitor clinical outcomes in women diagnosed with different molecular subtypes of breast cancer for a large portion (approximately 28%) of the US population.
| Reference Key |
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| Authors | Nadia Howlader, Sean F. Altekruse, Christopher I. Li, Vivien W. Chen, Christina A. Clarke, Lynn A. G. Ries, Kathleen A. Cronin |
| Journal | JNCI Journal of the National Cancer Institute |
| Year | 2014 |
| DOI |
10.1093/jnci/dju055
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| URL | |
| Keywords | Keywords not found |
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