A

The described CT pattern—terminal ileal and ileocecal mural thickening with sacculations (pseudodiverticula), hyper-enhancing mesenteric vessels (“comb sign”) and fatty proliferation—is typical of transmural granulomatous or infectious ileocecal disease (Crohn’s disease or intestinal tuberculosis) and can also mimic ischemic enterocolitis, but ulcerative colitis characteristically spares the terminal ileum/cecum and lacks transmural sacculations or marked mesenteric hypervascularity [Gore et al., 1984, PMID 6611056; Thoeni & Cello, 2006, PMID 16926320].