Duodenal angiodysplasia: MR angiographic evaluation.

We describe a patient in whom endoscopy failed to determine the origin of gastrointestinal bleeding, and magnetic resonance angiography showed dilated inferior pancreaticoduodenal veins that were considered indirect signs of the duodenal angiodysplasia. Incidentally, a connection between the inferior vena cava and the inferior pancreaticoduodenal veins were also noted. Repeat endoscopy and catheter angiography confirmed the presence of the angiodysplasias.