In carriers, the histopathology of breast tumors involved 19.6% (20/102) (HR+), HER2(−), 9.8% (10/102) (HR+), HER2(+), 4.9% (5/102) (HR−), HER2(+), and 62.8% (64/102) TNBC diagnoses. The gene discussed is ERBB2; the disease is breast neoplasm.