[An uncommon syndrome: the trapped popliteal vein. Apropos of a case]

A case of trapped popliteal vein, an exceptional syndrome, is reported in which the clinical appearance was that of a deep phlebothrombosis, compression being detected on phlebographic images. The etiology (combined congenital malformation and acquired muscle hypertrophy in this case) was revealed during exploratory surgery, which also allowed treatment by excision of the compressing agent without any direct vascular gesture.