Comb sign of Crohn disease

Massive

porto-mesenteric venous thrombosis in Crohn"s disease. Distal ileum with thickened wall and mucosal hyperenhancement (arrowheads), hypertrophied mesenteric fat with vascular engorgement ("comb sign", *) consistent with active Crohn"s disease, mild upstream bowel dilatation (*). Note patent portal (thick arrow) and mesenteric (arrows) veins.

Massive

porto-mesenteric venous thrombosis in Crohn"s disease. Distal ileum with thickened wall and mucosal hyperenhancement (arrowheads), hypertrophied mesenteric fat with vascular engorgement ("comb sign", *) consistent with active Crohn"s disease.