An Aortocaval Fistula Diagnosed with 1.5-T Magnetic Resonance Angiography

We report a case of aortocaval fistula demonstrated with gadolinium-enhanced magnetic resonance (MR) angiography. Specific radiographic features of this rare complication, such as early and intense enhancement of the inferior vena cava, are underlined with MR imaging. The exact location of the fistula can also be assessed with this noninvasive imaging technique. Moreover, the absence of iodinated contrast media makes it particularly suited for stable patients with renal insufficiency. A complete preoperative assessment of abdominal aortic aneurysm can be performed with MR imaging.