Abstract
Cystic adventitial disease of the popliteal artery is a rare disease, leading to narrowing of the arterial lumen and causing symptoms of lower limb ischemia. In this report, we describe a case of cystic adventitial disease of the popliteal artery, which was connecting to the knee joint. A 71-year-old man presented to our hospital with a complaint of intermittent claudication of the right lower limb. In the right limb, the ankle brachial pressure index was 0.80. Contrast-enhanced computed tomography indicated stenosis of the right popliteal artery. Cyst formation around the stenotic artery was also found. Thus, cystic adventitial disease of the popliteal artery was suspected, and surgical treatment was performed. Intraoperatively, we observed that adventitial cyst had a stalk connecting with the knee joint. The treatment consisted of resection of the popliteal artery and the cyst, and revascularization using the great saphenous vein. The stalk was ligated and devided. After operation, symptoms totally disappeared. The cause of this disease has not been revealed and various theories have been proposed for its etiology. In this case, the cyst was connected with the knee joint. We consider this finding to support the developmental theory.
