Figure 8a. Ulceration in Meckel diverticulum. (a) Photomicrograph (original magnification, x16; H-E stain) shows marked ulceration of the mucosal surface (arrow). An inflammatory infiltrate and hemorrhage are present. There is a focus of heterotopic pancreatic ducts (*). (b) Photomicrograph (original magnification, x16; H-E stain) shows peptic ulceration in an area of oxyntic gastric epithelium.