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Cystic adventitial disease with secondary occlusion of the popliteal artery.

Background: A 49-year-old male presented with progressive claudication of the left calf during and after short walks. He had no right-sided symptoms. Patient took no medication, he was a non-smoker and there were no obvious other anamnestic risk factors for atherosclerosis. Physical examination showed mild muscle atrophy of the left calf and no signs of venous insufficiency. Popliteal pulses were absent and pedal pulses weak. Doppler ultrasound examination and CT-angiography of the knees were performed.