Aneurysmal degeneration in the Omniflow II biosynthetic vascular graft

Despite advances in endovascular treatments, femoropopliteal bypass is still the best option for the treatment of lower-extremity occlusive artery disease. Omniflow II biosynthetic vascular grafts are often chosen as bypass grafts when autologous vein grafting is not possible. A negative feature of this graft is the tendency towards late biodegeneration with possible formation of graft aneurysms. In this case report, we present a thrombosed non-anastomotic biosynthetic graft aneurysm, which caused only a pulsatile mass in the inguinal region, in a 62-year-old male patient who had undergone a femoropopliteal bypass operation three years earlier. Aneurysm formation in vascular grafts is multifactorial and can cause life-threatening consequences. Therefore, all patients with biosynthetic vascular grafts should remain under lifetime surveillance with duplex ultrasound for aneurysmal graft degeneration and graft thrombosis.