RESUMEN
@#Male breast cancer (MBC), which constitutes only 1% of all breast cancer cases worldwide, is associated with mutations in the BRCA1 and BRCA2 genes, Klinefelter’s syndrome and a positive family history of breast or ovarian malignancy. Patients with MBC typically present with a palpable subareolar mass, with or without nipple involvement. MBC can be identified by mammography and/or ultrasonography. The definitive diagnosis is made through core needle biopsy and cytology. Breast cancer in men are typically low-grade, and usually estrogen- and progesterone-receptor positive. The surgical treatment of choice is usually a modified radical mastectomy. Hormone therapy, can be used as first-line treatment for hormone-receptor positive MBC, and as adjuvant or palliative therapy for advanced cases. The use of adjuvant cytotoxic chemotherapy has been shown to reduce cancer recurrence and improve overall survival. We present the case of a 51-year-old male who came in due to an enlarging right breast mass that had been removed twice in the past eight years. We were able to establish that the patient had MBC, for which he subsequently underwent a modified radical mastectomy