A case of a phyllodes tumor of the male breast

Abstract

Phyllodes tumor of the breast which accounts for about 0.3-0.5% of all female breast tumors is extremely rare in men. No male cases of the disease have been reported in Japan as far as we could review via Ichushi-web and PUBMED, and only 11 male cases have been seen in the literature. Here we report a male patient with a huge breast tumor which was surgically removed and accordingly diagnosed as phyllodes tumor by pathological examinations, together with a review of the literature.
A 28-year-old man was referred to the hospital because of an enlarging left breast tumor. There were no noteworthy family histories as well as medical histories. Contrast-enhanced MRI showed an 8cm-sized and well-defined tumor with a segmental margin in the left breast, and almost homogeneously and gradually intensifying enhancement pattern in the inside. A fine needle aspiration biopsy gave no malignant findings, but no definite diagnosis was made. According to patient's preference, the tumor was surgically removed for the purpose of diagnosis and treatment. The histopathological diagnosis was phyllodes tumor of the male breast which is extremely rare.