Fig. 21

Crohn’s disease in a 23-year-old male presenting with abdominal pain and transient obstructive episodes. MRE was obtained. Axial T2-W image (A) shows multi-focal mural thickening in several segments of the ileum (thick white arrows) associated with increased mesenteric fat (white dotted ovals) separating the bowel loops. Coronal pre- and post-contrast T1-W images (B, C) demonstrate increased striated mural enhancement of the affected bowel segments (thin white arrows), more predominant on the mesenteric border. Engorgement of mesenteric vessels is depicted (white asterisks) representing comb sign. There is also pseudodiverticula formation along the antimesenteric border (white arrowheads)