Fig. 2From: Atypical presentation of an ancient retroperitoneal schwannoma mimicking a renal hydatid cyst: a case report and literature reviewa Low-power view showing a predominantly spindle cell tumor (H&E, × 40). b High-power view showing highly pleomorphic and bizarre tumor cells (H&E, × 400). c IHC for vimentin showing diffuse positivity in tumor cells (IHC for vimentin, × 40). d IHC for s-100 showing diffuse positivity in tumor cells. IHC immunohistochemistry, H&E hematoxylin and eosin stainBack to article page