Supernumerary nipple. A histologic study.
Supernumerary nipple (SNN) is a developmental abnormality that occurs most commonly over the anterior aspect of the trunk in the pathway of the embryonic milk lines. This report describes a histologic study of 48 cases with 51 SNN found among 360,000 consecutive skin biopsy specimens received in a dermatopathology laboratory. Histologically, the supernumerary nipple shows all the components observed in the nipple area, including eqidermal thickening, pilosebaceous structures, smooth muscles and mammary glands. A brief review of the literature is also made concerning the incidence and other characteristics of this lesion.
D000293:Adolescent; D000328:Adult; D001940:Breast / Q000002:abnormalities* / Q000473:pathology; D002648:Child; D004817:Epidermis / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009130:Muscle, Smooth / Q000473:pathology; D009558:Nipples / Q000002:abnormalities* / Q000473:pathology; D012627:Sebaceous Glands / Q000473:pathology; D012867:Skin / Q000473:pathology