Mammary fibromatosis in a male breast.

Fibromatosis of the breast is a relatively benign, though locally invasive neoplasm. It is rare and difficult to diagnose. Risk of recurrence is there if it was inadequately excised. The best treatment is local wide excision with negative margins. We report a 46-year old gentleman with mammary fibromatosis. To the best of our knowledge, there are only few cases reported on male breast fibromatosis. The optimal management of it is unknown because of the rarity of the disease.