Case Report
Copyright ©The Author(s) 2017.
World J Gastroenterol. Jun 28, 2017; 23(24): 4462-4466
Published online Jun 28, 2017. doi: 10.3748/wjg.v23.i24.4462
Figure 1
Figure 1 Findings on colonoscopy. A: A single pine cone-shaped polyp with slightly reddish changes seen on a forward colonoscopic view of the lower rectum; B: Magnified narrow-band imaging shows whitish mucosal adhesions and slightly reddish villi (arrowheads) in the lesion; C: Magnified narrow-band imaging shows areas of abrasion and necrosis on the surface of the lesion but the detail is unclear; D: The lesion is seen to cover half of the circumference of the anal verge on a retroflex view.
Figure 2
Figure 2 Intraoperative view. Endoscopic submucosal dissection was performed to remove the polypoid lesion (arrowheads).
Figure 3
Figure 3 Histopathological findings. A: Histopathological examination was performed with hematoxylin and eosin staining (× 10). The polyp contains serrated glands in its mucosal layer (arrowheads); B: Crypts and surface epithelial tissue showing dysplastic structural changes and an increased number of goblet cells (arrowheads) are seen on sections stained with hematoxylin and eosin (× 100).