Obscure bleeding colonic duplication responds to proton pump inhibitor therapy

Figure 1 Colonic duplication. A: Macroscopic analysis of the resected colonic duplication: colonic duplication with a pen showing the anastomosis with the right colon; B: Pathological analysis of the duplication: pathological analysis showing intestinal duplication with a smooth muscle coat and an ectopic gastric mucosal lining; C: Bleeding ulcer in the colonic duplication: macroscopic view of a large bleeding ulcer near the anastomosis between the duplicated and the right colon; D: Computed tomography scan coronal view of the colonic duplication: retrospective coronal reconstruction of the emergency computed tomography scan showing the duplicated right colon (arrow) which was not visible in the axial view.