Abstract
A 66-year-old man noticed a tumor under his left nipple. The mass was elastic hard and had a clear border. On ultrasonography, a hypoechoic tumor, 8 mm in diameter, in the left EA region was seen. On core needle biopsy the tumor was diagnosed as an invasive ductal carcinoma. The patient underwent a mastectomy and a sentinel lymph node biopsy. On histopathology, invasive ductal carcinoma (scirrhous carcinoma) was diagnosed. ER was positive, PgR was positive, and the HER2 score was 0. Postoperatively, oral tamoxifen therapy was given. There have been no signs of recurrence during 6 months of follow up. To the best of our knowledge, this is the seventeenth case report of sentinel lymph node biopsy done in a male with breast cancer in Japan.
