A Case of Non-invasive Intracystic Male Breast Carcinoma

Abstract

Male breast cancer is rare and accounts for only 1% of all breast cancers.

Furthermore, among all breast cancers, the frequency of intracystic carcinoma is only 0.07%-3.2%. We encountered a case of non-invasive ductal carcinoma in a male. A 90-year-old man presented to the hospital with a palpable tumor in his left chest. On physical examination, a well-defined tumor measuring 20 mm in diameter was palpable in the left E area. The axillary lymph nodes were not palpable. A mammography examination showed a well-defined circular mass, which was classified as category 3. Ultrasonographic examination showed a 20-mm cystic mass with a 6-mm solid part projecting from the wall of the cyst. A contrast CT examination showed a 17-mm cystic mass with a tumor component of the contrast effect at the wall.

Mastectomy was performed, as a needle biopsy and cytology examination failed to confirm if the lesion was malignant. We made an incision at the side of the nipple, while preserving the nipple itself. Histological examination revealed a non-invasive ductal carcinoma. Taking the patient’s age into consideration, we did not administer adjuvant therapy, however, the patient has remained recurrence-free since the operation.