Immunoglobulin G4-related disease in the sigmoid colon in patient with severe colonic fibrosis and obstruction: A case report

Figure 3 Contrast-enhanced computed tomography scan of the abdomen findings. A: The proximal sigmoid colon was dilated. The middle colon wall was thickened. It was markedly enhanced in the arterial phase, representing the characteristics of neoplastic lesions or chronic abscesses; B: The sigmoid colon mass compressed the bladder, and the boundary between the bladder and the mass was unclear.