CD34 and schwannoma: On pathologic examination, the Antonini subtype was available or deduced in 26 out of 96 patients, 57.7% were type A (14 patients), half of the remaining were type B, and the other half were both types A and B. In all available immuno-histologic examinations, schwannomas stained positive for S100 in 97.9%, for vimentin in 13.5%, for glial fibrillary acidic protein (GFAP) in 5.2%, for CD34 in 2.1%, and for CD68 in 1%.