SALIVARY-GLAND DOUBLE TUMOR - SYNCHRONOUS IPSILATERAL PLEOMORPHIC ADENOMA AND ACINIC CELL-CARCINOMA OF THE PAROTID-GLAND

A 44-year-old woman underwent a partial parotidectomy for a slowly enl arging parotid mass diagnosed by fine needle aspiration biopsy as a pl eomorphic adenoma Though macroscopically recognized to be composed of two nodules, differing to some extent from one another, the mass appea red to constitute a single tumor. The microscopic examination disclose d two disparate neoplasms, which were separated from each other by a t hin fibrous band. The larger of the two nodules was a pleomorphic aden oma and the smaller one an acinic cell carcinoma. The metachronous - a nd, even more, the synchronous - occurrence of two histologically diff erent tumors in one major salivary gland is an exceptional and probabl y coincidental event.