Periductal mastitis and mammary duct ectasia in a male.

A case of periductal mastitis and mammary duct ectasia is presented in a 50 year old male, with presenting symptoms similar to those of females, namely subareolar breast lump and mastalgia. As far as can be ascertained only 4 cases of mammary duct ectasia and periductal mastitis in males have been reported previously. Since this entity is not well known in males it is possible that it may be underdiagnosed or misdiagnosed clinically and histologically.