PLEOMORPHIC ADENOMA OF THE BREAST - CYTOLOGY OF FINE-NEEDLE ASPIRATION AND ITS DIFFERENTIAL-DIAGNOSIS

The cytologic findings of a case of pleomorphic adenoma of the breast are presented. This rare tumor appeared identical to pleomorphic adeno ma of salivary glands. It presented diagnostic difficulties, however, because of its rarity and the fact that its associated clinical findin gs suggested a malignancy. The cytologic differential diagnosis includ es a phyllodes tumor, fibroadenoma, and metaplastic carcinoma. Awarene ss of this entity should permit a definitive diagnosis by aspiration b iopsy. (C) 1993 Wiley-Liss, Inc.