Fig. 13
Intestinal vasculitis in a 26-year-old female with known Behçet’s disease and positive HLA-B5 complaining of episodic RLQ pain. MRE was obtained. Coronal T2-W image (A) demonstrates irregular circumferential mural thickening of the cecum and proximal ascending colon (thick black arrows) without mesenteric side predilection or pericolic infiltration. Coronal and axial post-contrast T1-W images (B, C) show marked enhancement of thickened colonic wall (thick white arrows) mildly extending to ileocecal valve (thin white arrow) with low-grade mural hyperenhancement in the adjacent terminal ileum (white arrowhead). Axial DWI image (D) obtained at a b-value of 800 s/mm2 reveals restricted diffusion in the thickened cecum (white dotted oval)