 Meniscal ramp lesions (tears of the medial meniscus posterior horn at the menisco-capsular junction occur in approximately 25% of ACL-injured knees.Lateral meniscal root tears occur in approximately 7% of ACL injured knees

The force distribution is across the knee joint, increasing force concentration on the cartilage and other joint structures.Damage to the meniscus due to rotational forces directed to a flexed knee (as may occur with twisting sports) is the usual underlying mechanism of injury.