Primary sebaceous carcinoma of the male breast: Case report and review of literature.

Primary sebaceous carcinoma of the breast is an exceedingly uncommon neoplasm that is defined as primary invasive carcinoma of the breast with sebaceous differentiation in more than 50% of cells. All confirmed cases have been reported in women. Herein, we report the case of a 70-year-old man with a primary sebaceous breast carcinoma, the first unequivocal case to be reported thus far in a man.