Fig. 3From: A distal ileum malignant peripheral nerve sheath tumor causing intussusception in a patient in China: a case report a The tumor showing bundles and fascicles of atypical spindle cells with hyperchromatic nuclei and indistinct cytoplasm (HE, ×200). b S-100 staining showing diffuse positive reaction. c IHC staining for Ki67-labeling index 15~20%Back to article page