Case Report

Orbital Cystic Schwannoma Originating from the Frontal Nerve

Figure 3

(a) Photomicrograph of the tumor showing both Antoni A type tumor cells (left, consisting of dense spindle-shaped cells with nuclear palisading nuclei) and Antoni B type tumor cells (right, sparse oval cells with phlegmatic interstitium) (hematoxylin and eosin, ×100). (b) The tumor cells were surrounded by dense connective tissue (hematoxylin and eosin, ×40). (c) An immunohistochemical examination showed that the tumor cells were strongly positive for vimentin (×100).