The physician should also assess for any increased joint-line opening with valgus and varus stress that could indicate a medial collateral ligament complex injury or posterolateral corner injury. When examining a patient for ligament laxity, remember that underlying degenerative disease of a compartment may cause "pseudolaxity," allowing the joint to actually collapse on the contralateral arthritic compartment, thus giving the false sense of an ipsilateral collateral ligament injury.