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Idiopathic retroperitoneal fibrosis (IRF), usually affects the ureter, although the biliary tree, duodenum and vasculature may also be susceptible. This case report describes a 64-year-old man with IRF, who presented painless watery diarrhea, radiological features of obstructive jaundice and duodenal obstruction, and ultimately an obstruction of the inferior vena cava. We employed tamoxifen for his treatment, but the disease progressed and the patient died of multiple organ failure two years after the onset. While the cause of IRF in this patient was obscure, we suspected his painless watery diarrhea indicated chronic ischemia of the small bowel, and the findings of an abdominal CT scan were extremely valuable in indicating IRF.

internal medicine

A Rare Case of Idiopathic Retroperitoneal Fibrosis Involving Obstruction of the Mesenteric Arteries, Duodenum, Common Bile Duct, and Inferior Vena Cava