Abstract
A 74-year-old female had a 1.8-cm tumor in her right breast with a diagnosis of breast cancer, breast conserving surgery with sentinel lymph node biopsy was performed. The pathological diagnosis was non-invasive apocrine carcinoma. Both ER and PgR were negative ; Her2 was positive. One year later, a hypoechoic tumor was found in her left breast. Apocrine carcinoma was suggested based on core needle biopsy results. Since the MRI image suggested extensive intraductal spread, a mastectomy of the left breast with sentinel lymph node biopsy was done. The final histological diagnosis was apocrine carcinoma which was mostly non-invasive. This case is likely very rare although another previous case report of bilateral apocrine carcinoma was found on literature review.
