BREAST SOLITARY SCHWANNOMA - FINE-NEEDLE ASPIRATION BIOPSY AND IMMUNOCYTOCHEMICAL ANALYSIS

A case of intramammary solitary schwannoma (SS) (benign neurilemoma) d iagnosed by fine-needle aspiration biopsy (FNAB) and supported by immu nocytochemical study is reported. The tumor arose in the right breast of an 18-yr-old woman and was clinically and radiologically considered a fibroadenoma. The smears obtained by FNAB of the lump showed cluste rs of spindle-shaped cells and suggested a benign mesenchymal neoplasm . The presence of some structures reminiscent of Verocay bodies and th e immunocytochemical reactivity for S-100 protein antiserum demonstrat ed the schwannian nature of the tumor and suggested the diagnosis of S S. The final histologic examination confirmed the cytologic diagnosis. (C) 1994 Wiley-Liss, Inc.