[Cystic degeneration of the adventitia of the popliteal artery--case report].

: Cystic adventitial disease (CAD) is a rare diagnosis with a higher number of the patients in recent years. The article gives a brief of the pathology and etiolopathogenesis of adventitial cystic disease and two case reports of the patients with CAD of the popliteal artery treated in our department between 1997 and 2001. Successful results are achieved only with surgical treatment.