Nipple Adenoma Arising in a Supernumerary Mammary Gland: A Case Report

Abstract

Nipple adenoma, a benign tumour of the breast, is a relatively rare occurrence. This report describes an even rarer case of nipple adenoma arising within a supernumerary mammary gland. The presenting symptoms were a lump and throbbing pain in the axilla. Ultrasound scan and core biopsy proved inconclusive so surgical excision was undertaken, thus allowing a histological diagnosis. The patient made a full and uneventful recovery. Physicians must be aware that diseases of the breast and nippleareola complex may also arise in accessory mammary tissue and accessory nipples should not be discounted as a common congenital anomaly. Instead they must be regarded, examined and treated as normal breast tissue.