70-year-old male with left medial joint pain. MENISCI: There is poorly defined increased signal intensity within the posterior horn and body of the medial meniscus that contacts the tibial articular surface indicating a combination of intersubstance degeneration and undersurface fraying/tearing. There is also blunting of the posterior horn closer to the root, indicating a partial thickness radial tear. The anterior horn appears intact. There is intersubstance degeneration of the lateral meniscus, but no discrete tear.ARTICULAR CARTILAGE AND BONE: There is full thickness loss of articular cartilage along the patella, particularly along the lateral facet with similar full thickness loss of articular cartilage along the lateral facet of the femoral trochlea. There are also small subchondral cysts in the patella. The femoral trochlea appears shallow, perhaps reflecting mild dysplasia. There is relatively mild degeneration of the articular cartilage of the tibiofemoral compartments with cartilage heterogeneity particularly noticeable along the lateral tibial plateau. There are small tricompartmental osteophytes. There is a small focus of signal abnormality within the tibial plateau posteriorly, likely representing a degenerative cyst/ganglion at the posterior cruciate ligament attachment. LIGAMENTS: The anterior and posterior cruciate ligaments appear normal for age as does the medial collateral ligament. There is intermediate signal intensity within the proximal fibers of the lateral collateral ligament proper suggesting mild degeneration. EXTENSOR MECHANISM: The quadriceps tendon appears slightly thickened, which may reflect tendinosis or prior strain injury with mild edema in the fat pad posterior and medial to the distal tendon. There is a small amount of ossification of the proximal patellar tendon, suggesting chronic tendinosis.ADDITIONAL
1.Medial meniscal tearing as described above.2.Full thickness cartilaginous degeneration involving the patellofemoral joint.3.Other findings as above.