[Discrepancy between arthrography and arthrotomy with posterior lesions of the medial meniscus (author's transl)].

In 102 cases with arthrographic proven lesion of the medial meniscus clinical, radiological and operative results were correlated. In 10% the lesion could not be found by arthrotomy. These were all cases with lesions in the posterior part of the meniscus, mostly at the basis. It must be assumed, that the posterior portion of the medial meniscus cannot be judged completely by arthrotomy, especially if a ventral approach is used.