49-year-old female patient with right knee pain. MENISCI: There is an obliquely oriented tear through the body and posterior horn of the medial meniscus with what appears to be a flipped fragment within the weightbearing portion of the medial compartment. There is additional intrasubstance signal extending to the periphery in the posterior horn, suggestive of degeneration or a horizontal tear. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is complete and near complete articular cartilage loss in the medial patellar facet. There is subjective thinning of the articular cartilage in the lateral compartment without a fluid-filled cartilage defect.There is complete cartilage loss in the weightbearing portion of the medial femoral condyle, measuring approximately 2 cm in diameter. There is underlying subchondral linear low T2 signal intensity and reactive marrow changes. LIGAMENTS: The anterior cruciate ligament, posterior cruciate ligament, lateral collateral ligament complex, medial collateral ligament, and patellar retinacula are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Full-thickness chondral defect in the medial femoral condyle with underlying reactive marrow changes.2.Tearing of the body and posterior horn of the medial meniscus and findings compatible with a flipped fragment in the weightbearing portion of the medial compartment.