Incidental Large Deep Femoral Artery Aneurysm Successfully Treated With Autologous Vein Bypass Reconstruction: A Case Report

Deep femoral artery (DFA) aneurysms are rare vascular lesions that may remain asymptomatic until they enlarge or rupture. We report a case of a 74-year-old man with an incidentally detected large DFA aneurysm measuring 41 mm, discovered during evaluation for left lower limb deep venous thrombosis (DVT). The patient underwent revascularization with a common femoral artery (CFA)-to-deep femoral artery bypass using an autologous great saphenous vein graft. Postoperative contrast-enhanced computed tomography (CECT) confirmed graft patency, and the patient recovered without complications. Histopathology revealed atherosclerotic changes with cystic medial degeneration. This case highlights the clinical significance of early detection and the advantages of autologous vein graft reconstruction.