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The medial collateral ligament is the most commonly injured knee ligament. There is a history of valgus displacement and external rotation at the knee.
The soft tissues supporting the knee rupture in a layer-by- layer sequence:
Damage to the lateral knee ligaments is less common than injury of the medial ligaments. Injury to the lateral ligament results from the knee being forced into varus.
The posterior cruciate ligament may be damaged if:
The anterior cruciate ligament may be damaged by sharp twisting movements: