Surgical Treatment of a Giant Popliteal Venous Aneurysm and Arteriovenous Fistula on the Adjacent Femoral Vein and Its Postoperative Findings

A case of a giant popliteal venous aneurysm that caused massive pulmonary thromboembolism with an arteriove-nous fistula draining into the adjacent proximal femoral vein is reported herein. Deep veins in the lower leg were occlud-ed by thrombi. The inlet and outlet orifice inside the aneu-rysm was closed and aneurysmorraphy was performed. The fistula was retained on the estimation that it would maintain the blood flow and prevent thrombus formation inside the femoral vein. The aneurysm was shrunk, the femoral vein was patent, and the fistula was not observed 1 year later, although it still existed 1 week after the operation.