Male, 69 years old. Bilateral knee pain, instability. ARTICULAR CARTILAGE AND BONE: There are large osteophytes at the medial, lateral, and patellofemoral compartments. There is marked tricompartmental joint space narrowing with complete loss of the articular cartilage in the medial and lateral compartments and severe patellar cartilage thinning. There is bone marrow edema within the lateral tibial plateau.MENISCI: There are irregular blunted small remnants of the posterior horn of the lateral meniscus and posterior horn of the medial meniscus. The anterior horns appear absent.LIGAMENTS: The ACL is not visualized, compatible with chronic tear. The PCL and collateral ligaments are unremarkable.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1.Severe osteoarthritis with associated cartilage loss, bone marrow reactive changes, and significant meniscal degeneration as described above.2.Chronically torn ACL.