MRI
Large knee joint effusion.
Horizontal tear of the body and posterior horn medial meniscus with a displaced flap overlying the posterior root attachment and intra- and para-meniscal cyst formation. Lateral meniscus is intact.
Deficient anterior cruciate ligament with patchy scar tissue along its expected course. Anterior tibial translation. Posterior cruciate ligament is intact.
Chronic proximal medial collateral ligament rupture with scarring of torn fibres onto the medial joint capsule. Lateral collateral ligament complex is intact. Small popliteus tendon sheath effusion.
Full-thickness chondral defect of the weight-bearing medial femoral condyle. Mild patellar and lateral compartment chondromalacia.