Rectal granular cell tumor treated by endoscopic resection: A case report and review of literature

Figure 1 Histopathological and immunohistochemical findings of the rectal granular cell tumor. A: Tumor cells arranged in nests (× 40); B: Tumor cells with abundant eosinophilic granular cytoplasm (× 100); C: Positive immunohistochemical staining for S-100 protein; D: Ki-67 Labeling index of 3%.

Figure 2 Endoscopic findings and treatment of the rectal lesion. A: Endoscopic image showing a 6-mm polypoid lesion in the rectum; B: Submucosal injection of methylene blue and glycerol fructose before resection; C: Post-resection wound surface; D: Wound surface with clips.