Figure 4. Patient 2. Preoperative cavography (left) showing a tight stenosis of the upper part of the retrohepatic inferior vena cava resulting from carcinoma of the right hepatic lobe. Note the backflow into the renal veins and one collateral lumbar vein. Despite this drainage, extended right hepatectomy with inferior vena cava resection and ligation led to intraoperative oliguria and hypotension, which were reversed by venous reconstruction. Cavography on the postoperative day 14 (right) showed a patent prosthesis. The extremities of the graft are designated by the white arrows.