Diagnosis of Iatrogenic Femoropopliteal bypass Graft Entrapment Syndrome by MDCT: A Case Report

femoropopliteal bypass graft from the groin to the knee to save the lower extremities of patients that have severe arterial disease. The most common cause of early failure of a femoropopliteal bypass graft is usually technical error. Sometimes, extrinsic compression by surrounding structures may result in impediment of blood flow within the graft (1). The femoropopliteal bypass graft can be entrapped by the medial head of the gastrocnemius muscle in the popliteal fossa against the bone. The same situation is seen in “popliteal artery entrapment syndrome”, in which the native popliteal artery is compressed by the abnormally migrated medial head of the gastrocnemius (2). In previous reports, physical examinations, Doppler ultrasonography, and conventional angiography of patients undergoing a femoropopliteal bypass graft have been described (1-4). Multidetector row computed tomography (MDCT) might also be a useful tool for diagnosing this condition. MDCT offers high spatial resolution and can provide excellent depiction of not only luminal patency but also adjacent anatomical structures that cause the extrinsic compression. We report a case of iatrogenic entrapment of a femoropopliteal bypass graft that was confirmed by the use of MDCT.