Preoperative abdominal computed tomographic angiograms. A) The coronal view (3-dimensional reconstruction) shows a 13-cm abdominal aortic aneurysm with communication and synchronous filling of contrast medium between the aorta and inferior vena cava. Transverse views show B) the aneurysm and no evidence of retroperitoneal rupture, and C) the aortocaval fistula.