31-year-old male with left knee pain. Evaluate for chondromalacia. MENISCI: There is deformity and signal abnormality of the lateral meniscus, particularly involving the body and posterior horn, indicating complex tearing. Only a small remnant of the body of the meniscus remains. The anterior horn is relatively spared. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is moderate to severe degeneration of the articular cartilage of the lateral tibiofemoral compartment, particularly involving the lateral femoral condyle and the lateral tibial plateau adjacent to the torn meniscus, with areas of near full-thickness to full-thickness cartilaginous degeneration. Intra-articular osteophyte formation and foci of degenerative subchondral signal are also seen in this region. There is a full-thickness cleft in the articular cartilage of the medial facet of the femoral trochlea. There is also heterogeneity of the articular cartilage of the median eminence of the patella, which indicates degeneration. There are also small medial and patellofemoral compartment osteophytes. The articular cartilage of the medial compartment appears relatively spared. LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Osteoarthritis particularly affecting the lateral tibiofemoral compartment and also the patellofemoral articulation with loose bodies in the joint.2. Extensive tearing of the lateral meniscus.