[A patient with cystic adventitia degeneration and entrapment syndrome of the popliteal artery].

Adventitial cystic disease and entrapment syndromes of the popliteal artery are rare causes of ischemia in the lower leg in younger patients without cardiovascular risk factors. The 38-year-old male patient described in this case report showed both types of these rare abnormalities in the same vessel, both usually requiring surgical revision even in causing only few symptoms.