[Extended diagnosis for lesions of the capsule and the ligament of the knee joint (author's transl)].

X-rays taken under mechanical positioning of the joint with standardized conditions are helpful aids in the diagnosis of injuries of the knee capsule and ligaments. In comparison to the non-affected knee the extent of instability of the joint can be exactly demonstrated. Arthrography is of little help in fresh injuries to the knee capsule and ligaments, but can be useful to assess the residuals of old damage to the joint. Arthroscopy has its place mainly in the diagnosis of old injuries and hardly any in fresh lesions. In general, however, arthroscopy is a very valuable diagnostic procedure.