Fig. 2
From: Porta hepatic schwannoma: case report and a 30-year review of the literature yielding 15 cases
a Histological examination findings of the tumor: bundles of uniform spindle cells whose elongated nuclei were arranged in a palisading pattern (hematoxylin and eosin; magnification, ×100). b Immunohistochemistry revealed that tumor cells were positive for S-100 protein (magnification, ×100). c Immunohistochemistry revealed that tumor cells were negative for CD117 (magnification, ×100). d Immunohistochemistry revealed that tumor cells were positive for GFAP (magnification, ×100)