A Case of Fibroadenoma Arising in the Accessory Breast Tissue of the Axilla / 대한피부과학회지

ABSTRACT

Accessory breast tissue of the axilla is one of the varieties of supernumerary breast tissue, which is observed after puberty. The tissue is capable of developing identical pathophysiologic changes as normal breast tissue. The pathologic findings of the accessory breast tissue were classified as normal breast tissue, cystic disease, chronic mastitis, atypical ductal hyperplasia, and fibroadenoma. Among these, the fibroadenoma is relatively uncommon. We have experienced a case of fibroadenoma arising in the accessory breast tissue of the axilla. A 28-year-old woman had a 8-month history of 1.5x1.3cm and 1.1x1.2cm sized firm nodules, deeply located in subcutaneous tissue on the left axilla. The size of the lesion was constant. However, she complained of mild tenderness at every premenstrual period. The histopathologic finding of the lesion revealed the typical features of fibroadenoma with accessory breast tissue.