Unusually rapid growth of a duodenal muco-submucosal elongated polyp: A case report

Figure 1  Computed tomography revealed a strip-like soft tissue density lesion in the descending duodenum (arrows).

Figure 2 Endoscopic views of the polyps. A: Gastroduodenoscopy performed 15 months earlier showing a 1.5-cm mucosal elevation in the second portion of the duodenum; B and C: Gastroduodenoscopy revealed a 10-cm slender, elongated, pedunculated, “worm-like mass with a smooth surface in D2; D: Endoscopic view under narrow band imaging.

Figure 3 Histological section (hematoxylin and eosin staining). A: Low-power view demonstrating the overall architecture of the polyp; B: Higher magnification highlighting architecturally normal small intestinal mucosa (black arrows) overlying a core of submucosa containing abundant adipose tissue (blue arrows) with submucosal vessels (green arrows). No significant inflammation is seen.