Muco-submucosal elongated polyps of the gastrointestinal tract: A case series and a review of the literature

Figure 1 Endoscopic views of the polyps. A: Gastroduodenoscopy revealed a 4 cm long, slender, “worm-like” polyp in the second part of the duodenum; B: Gastroduodenoscopy showed a 2.2 cm long, slender polyp in the duodenum; C: Colonoscopy showed a 1.4 cm long, slender polyp in the descending colon.

Figure 2 Histological section (hematoxylin and eosin staining). A: Case 1; B: Case 1 with normal small intestinal mucosal lining; C: Case 3 with normal large bowel mucosa overlying the submucosa which contains a prominent vascular component.

Figure 3 Immunohistochemistry. A: Positivity for CD31 in the endothelial cells of both vascular components; B: Positivity for D2-40/podoplanin selectively expressed by the endothelial cells in the lymphatic vessels.