Fine needle aspiration biopsy diagnosis of adenoid cystic carcinoma of the breast. A case report.

A case of adenoid cystic carcinoma arising in the breast is presented. The diagnosis was established on a fine needle aspiration (FNA) biopsy sample with histopathologic corroboration. The aspirate yielded a typical smear composed of round, multilayered clusters of uniform epithelial cells arranged around cores of homogeneous, acellular material. Both the conclusiveness of FNA biopsy in diagnosing this rare mammary neoplasm and its resulting in immediate treatment are stressed.