Abstract
We present a case of invasive ductal breast carcinoma present within a fibroadenoma (FA). A 65-year-old woman had a right breast mass, 2.5×2.0 cm in size, which was located in the upper outer quadrant. Mammography showed an oval-shaped, high density mass with grouped-pleomorphic calcifications. The tumor border was almost completely circumscribed, and it was partially microlobulated. Ultrasound examination showed an internal heterogeneous hypoechoic round mass. The tumor margin was almost completely sharply delineated and smooth, but it was partially rough on the side closest to the nipple. On histology of the needle biopsy of the tumor, both a fibroadenoma and an invasive ductal carcinoma were noted. The patient had a mastectomy and a sentinel node biopsy. On pathology, an invasive ductal carcinoma coexsisting within a fibroadenoma was diagnosed.
