Giant fibroadenoma of breast in an adolescent girl

A 12-year-old girl presented with a 15 x 15 cm, rapidly enlarging mass in left breast. Fine-needle aspiration cytology showed a benign proliferative breast lesion. Total excision of the mass was done preserving nipple and areola. Histopathology features were suggestive of giant fibroadenoma with benign phyllodes