[Ganglion recidives of the knee joint. Arthrography and clinic (author's transl)].
56 patients with 59 operated popliteal cysts were controlled clinically and by arthrography. In 14.3% (8 knee-joints) a recidive was found. In 64% the arthrogram showed a tout outline of the joint-capsule. In 30% a small and big bursa was seen. Recessus with long narrow handle can be a potential recidive of ganglion. Clinic and arthrogram allow to make a difference between "recidive" and "ganglion". The clinical recidive may be a new "ganglion".