Localized pseudomembranous colitis in the cecum and ascending colon mimicking acute appendicitis

Figure 1 Abdominal ultrasonographic finding. Non-specific colitis in the ascending colon and the cecum and secondary mild inflammation of the appendix.

Figure 2 Abdomen computed tomography scan shows circular wall thickening in the cecum and the ascending colon and pericolic infiltration and adjacent lymph nodes.

Figure 3 Colonoscopic finding shows multiple elevated yellowish or white pseudomembranes with hyperemic, edematous mucosa in the ascending colon and cecum.

Figure 4 Histological finding shows the typical volcano-like exudate, inflammatory cells, mucofibrinous material and inflammatory colonic mucosa with erosion (HE stain, × 40).

Figure 5 Follow-up colonoscopic finding showing normal mucosa in the ascending colon and the cecum.