Lobular carcinoma in situ of the breast within a fibroadenoma. A case report.

Background: Fibroadenoma is a benign breast tumor that is effectively treated by local excision. Although uncommon, breast fibroadenoma may harbor breast carcinoma, either in situ or invasive.

Case: We present a 27-year-old woman who presented for the management of an apparently benign mass in the right breast.