Crohns disease - terminal ileitis, fistulizing

Case contributed by Michael P Hartung
Diagnosis almost certain

Severe short segment terminal ileitis leads into the ileocecal valve with wall thickening/irregularity and mucosal hyperenhancement with surrounding mesenteric edema. Minor upstream dilation without obstruction. Some branching inflammatory tracts extend along the posterior aspect suggesting entero-enteric or blind-ending fistulae involving the terminal ileum. No abscess. Inflammation with at least some degree of narrowing of the right ureter at this level resulting in mild upstream hydroureteronephrosis. 

Case Discussion

Typical findings of fistulizing Crohns disease with entero-enteric/blind-ending fistulous tracts involving the inflamed terminal ileum. 

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