Background: Breast cancer subtype classification according to hormone receptors (HR) and human epidermal growth factor receptor 2 (HER2) using immunohistochemistry is the standard practice for therapeutic decision making. Objective: To design future studies information on characteristics and survival of each subtype is essential. Method: We conducted a retrospective study to analyze clinical and pathologic features as well as survival data according to breast cancer immunohistochemistry subtype. Results: There were 211 women with a RH(+)/HER2(–) breast cancer subtype, 53 HR(+)/HER2(+), 16 HER2(+) and 23 HR(–)/HER2(–), with a median overall survival in months of 39 (20.5-62.7), 42 (25.5-65), 42 (13.7-67.7) and 26 (11-78), respectively, for a 3.7 hazard ratio of death (95% Confidence Interval [CI]: 1.3-10.3) for the triple negative group as compared to the HR(+)/HER2(–) group (p = 0.01). Conclusions: HR positive subtypes by immunohistochemistry where most frequent and showed a greater overall survival compared to the triple negative subtype.
CITATION STYLE
Valle-Solís, A. E., Miranda-Aguirre, A. P., Mora-Pérez, J., Pineda-Juárez, J. A., Gallardo-Valencia, L. E., Santana, L., … Cárdenas-Cárdenas, E. (2019). Supervivencia en cáncer de mama por subtipo mediante inmunohistoquímica: Un estudio retrospectivo. Gaceta Medica de Mexico, 155, S50–S55. https://doi.org/10.24875/GMM.19005133
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