Posterolateral corner injuries of the knee can be difficult to evaluate in
the acute clinical setting. Often they are seen in conjunction with anterior
and posterior cruciate ligament injuries. Injured structures of the
posterolateral corner may include the lateral collateral ligament, the
popliteus, the popliteofibular ligament, the biceps femoris, and the
posterolateral capsule. The early diagnosis of these injuries on the lateral
side of the knee may enable a repair of the disrupted tissues, rather than a
reconstruction requiring an autograft or allograft.