[Correlation and discordance between arthrography and arthroscopy of the knee]

We retrospectively compared two series of 50 consecutive arthroscopies, performed in 1980 and in 1990. The age and sex data of the group were essentially the same. The number of arthrographies performed prior to arthroscopy varied only slightly (64% versus 58%), as did the indications, dominated by uncertain clinical findings (58%). One quarter of the procedures constituted useless indications in an obvious clinical context. These 2 groups were studied separately, cumulatively and according to the diagnoses. Analysis showed a better arthrography-arthroscopy correlation in 1990. The arthrographic technique and the technician himself appear to be important factors. Progress in the technique has increased the quality of imaging of certain anatomical structures. This good overall concordance was also observed for analysis of the diagnoses. We therefore conclude that the current indications for arthrography prior to arthroscopy are any uncertain diagnosis after a thorough clinical examination, when meniscal suture is considered, lateral meniscal cyst and a medicolegal context.