Knee pain MENISCI: There is abnormal morphology and signal intensity of the posterior horn of the medial meniscus consistent with tearing. Is also blunting of the inner free edge of the body as seen on the coronal views suggesting a radial component. The anterior horn appear relatively preserved. There may be mild intrasubstance degeneration of the lateral meniscus but there is no evidence of tear.ARTICULAR CARTILAGE AND BONE: There is a full-thickness defect of the articular cartilage of the medial femoral condyle measuring approximately 1.5 cm in length. The articular cartilage of the medial tibial plateau appears relatively preserved. There is mild heterogeneity of the articular cartilage of the lateral compartment but this is otherwise intact. There is a focus of full-thickness articular cartilage loss involving the lateral patellar facet measuring approximately 1.5 cm. This is superimposed upon moderate articular cartilage degeneration. There is full-thickness articular cartilage loss of the lateral femoral trochlea as well. There are tricompartmental osteophytes.An ovoid focus of low signal intensity measuring 5 mm is seen just inferior to the posterior horn of the lateral meniscus. A second larger ovoid focus of low signal intensity is identified in the intercondylar notch measuring approximately 13 mm. These may represent loose bodies within the joint.LIGAMENTS: No significant abnormality noted. EXTENSOR MECHANISM: The cruciate and collateral ligaments are intact.ADDITIONAL
1. Medial meniscus tearing as described above. The lateral meniscus appears relatively preserved.2. Varying degrees of tricompartmental articular cartilage loss with full-thickness defects involving the medial femoral condyle and lateral patellar facet. There are probable loose bodies within the joint as well.3. Large Baker's cyst.