Postoperative findings. (A, B). Postoperative T1-weighted enhanced images showing total tumor removal: (A) axial; (B) coronal. (C) Photomicrographs showing tissue formed by compact neoplastic proliferation of spindle-shaped cells, with elongated nuclei arranged in interlacing fascicles (hematoxylin and eosin; original magnification ×100). (D) Photomicrograph showing the tumor with strong positivity on immunostaining against S100 protein (original magnification ×100).