THIS STUDY is based on an analysis of over 100 cases of torn meniscus which have occurred in my practice. It is mainly concerned with the relative diagnostic value of the various symptoms and signs. Of special interest, however, is the fact that a certain proportion of tears are not visible on entering the joint and only become visible when the meniscus has been partially removed. These are the tears in the middle and posterior half of the meniscus and are the ones which require the surgeon to be sure of his diagnosis in order that he may proceed with confidence in the removal of a meniscus which may not seem to be torn when the joint is opened.
Removal of a torn meniscus benefits a knee. Removal of a normal meniscus confers no benefit and may indeed make the joint worse. If a surgeon has definitely made a diagnosis