35-year-old female with left knee pain. MENISCI: The lateral meniscus appears intact. The medial meniscus appears intactARTICULAR CARTILAGE AND BONE: There is partial-thickness articular cartilage degeneration along the medial femoral condyle. The articular cartilage along the lateral tibial femoral compartment is relatively spared. There is partial-thickness articular cartilage degeneration and superficial fraying along the lateral facet of the patella. There is a focal near full-thickness articular cartilage defect along the lateral facet of the femoral trochlea with areas nearly completely devoid of articular cartilage. Heterogeneous bone marrow signal abnormality is nonspecific but may represent residual islands of red marrow. There are tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Mild osteoarthritic changes of the knee as described above including a near full-thickness articular cartilage defect along the lateral facet of the femoral trochlea.2. Small joint effusion extending posteromedially into a tiny Baker's cyst. Multiple foci of low signal abnormality within the joint space may represent loose bodies/articular cartilage fragments versus a synovitis as described above.