64-year-old female with knee pain. MENISCI: There is globular increased signal abnormality within the posterior horn of the medial meniscus consistent with intrasubstance degeneration. There is branching linear signal abnormality within the posterior horn of the medial meniscus which extends to the femoral and tibial articular surfaces consistent with complex degenerative tearing, which also extends into the body of the meniscus. There is blunting of the anterior horn of the meniscus which may reflect degeneration/tearing. There is deformity and linear branching signal abnormality within the posterior horn of the lateral meniscus which extends to the tibial articular surface consistent with complex degenerative tearing. The anterior horn appears intact.ARTICULAR CARTILAGE AND BONE: Heterogeneous bone marrow signal abnormality likely represents residual islands of red marrow. There is full-thickness articular cartilage degeneration along the weightbearing surface of the medial femoral condyle and medial tibial plateau with underlying degenerative subchondral signal abnormality. There is subjective thickening of the articular cartilage of the lateral compartment. There is full-thickness articular cartilage degeneration affecting the patellofemoral joint with portions of the lateral facet of the patella and femoral trochlea completely devoid of articular cartilage with underlying degenerative subchondral signal abnormality. There are tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact. There is perhaps mild thickening of the patellar tendon suggesting mild tendinosis.ADDITIONAL
1. Severe osteoarthritic changes of the knee with associated full-thickness articular cartilage degeneration most pronounced along the patellofemoral and medial tibiofemoral compartments.2. Complex degenerative tearing of the medial and lateral meniscus as described above.3. Small joint effusion with foci of internal fat signal intensity suggesting lipoma arborescens.