Aneurisma idiopático da veia cava inferior – diagnóstico tomográfico

A 62-year-old woman undergoing control exams following resection of a left renal tumor two years previously reported only dyspnea on moderate to strenuous exertion. Computed tomography (CT) angiography of the chest, abdomen and pelvis revealed an idiopathic aneurysmal dilatation of the proximal inferior vena cava (IVC) next to the right atrium, 56 mm on its largest axis (type I in the Gradman and Steinberg classification) (Figure 1). The middle, right and left hepatic veins drained into the aneurysmatic area, which was herniated into the thoracic region with part of the hepatic segment. Distal to the aneurysm, in the intrahepatic portion, the IVC was practically collapsed, with a very small caliber, for about 35 mm. In the subhepatic region, into which the other abdominal and