Isolated colonic neurofibroma, a rare tumor: A case report and review of literature

Figure 1 Findings at colonoscopy. A 3 cm submucosal pedunculated polyp is seen about 15 cm from anal verge.

Figure 2 Findings with endoscopic ultrasound. A 2.8 cm × 15.2 cm avascular lesion of mixed echogenicity seen in the submucosa with no communication with muscularis mucosa or propria.

Figure 3 Histopathology of the tumor at low power × 10 magnification. Bland spindle cell tumor is seen in a fascicular growth pattern.

Figure 4 Immunohistochemistry of the lesion at × 50 magnification. Tumor is diffusely positive for S100. Note the penetrating axons with neurofilament stain.