title: Solitary keratoacanthoma of the nipple in a male. Case report.
abstract: A heretofore undescribed localization for solitary keratoacanthoma, namely the skin of the nipple, is reported. The tumor developed in a 69-year-old man who had suffered a trauma in the thorax near the left nipple 5 months before. A possible origin in mammary ducts, considering the breast as a modified sweat gland, is discussed.
mesh_terms: D000368:Aged; D001940:Breast / Q000473:pathology; D001941:Breast Diseases / Q000473:pathology; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology; D008297:Male; D009558:Nipples / Q000473:pathology; D012867:Skin / Q000473:pathology; D012871:Skin Diseases / Q000473:pathology