Figure 7b. Meckel diverticulitis. (a) Photomicrograph (original magnification, x16; H-E stain) shows submucosal edema and hemorrhage (S). There is a microabscess within the muscularis propria (arrow), as well as an inflammatory infiltrate in the subserosal fat (*). (b) Photomicrograph (original magnification, x40; H-E stain) shows regenerative epithelium (arrow) over a healing ulcer with granulation tissue. There is abundant fibropurulent exudate in the lumen (*).