 Of the 52 knees reviewed, 80% of group 1 had lateral meniscus tears and 29% had associated medial meniscus tears.None of the medial meniscus tears were isolated; medial meniscus tears were not present in the absence of a lateral meniscus tear.From this study, it was concluded that the structures more typically involved in a triad were the anterior cruciate ligament, medial collateral ligament, and the lateral (not medial) meniscus.