[Male diabetic mastopathy: description of a case].

A case of diabetic mastopathy in a male is described. The patient is a 44 year old man with an insulin-dependent diabetes of long duration, presenting with a poorly defined nodule in his left breast. The lesion was constituted by a dense fibrous tissue with epithelioid stromal cells and a perivascular nodular lymphoid infiltrate. The differential diagnosis and the literature on diabetic mastopathy are briefly reviewed, particularly regarding male patients. The present case indicates that diabetic mastopathy may arise in the male breast.