Inferior mesenteric thrombophlebitis secondary to sigmoid diverticulitis
Severe left iliac fossa pain ? diverticulitis
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Filling defect consistent with clot in the IMV associated with surrounding inflammation of fat up to the splenic vein. Substantial sigmoid diverticular disease with inflammation in the adjacent sigmoid mesocolon indicative of diverticultis.
Inflammation in the wall of the sigmoid colon extending into the draining veins producing thrombophlebitis. This is a rare but recognized complication of diverticultis that can go onto portal vein thrombosis and liver abscesses (i.e. portal pyaemia) if not treated.