Figure 2

Histological features of a schwannoma. This is a spindle cell lesion surrounded by a rim of lymphocytes (A), ×100. The lesion is composed of fascicles of bland spindle cells (B), magnification ×600. There are aggregates of foamy histiocytes (C), magnification ×400. Thick-walled blood vessels are focally present (D), magnification ×200. The cells express S-100 protein (E), glial fibrillary acidic protein (F), magnification ×100; are negative for CK7 (G), magnification ×200; but express broad range cytokeratins (H), magnification ×100. The Ki67 index is very low, less than 1% (I), magnification ×400.