56-year-old female with medial joint line pain. Evaluate meniscus. MENISCI: There is branching signal abnormality within the body of the medial meniscus, indicating a complex tear with a displaced flap of meniscus within the medial gutter beneath the body of the meniscus. There is globular increased signal which extends from the body into the posterior horn of the medial meniscus representing intrasubstance degeneration. The signal also extends to the femoral articular surface, indicating additional degenerative tearing. There is also intrasubstance degeneration within the anterior horn of the medial meniscus. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is near full-thickness to full-thickness degeneration of the articular cartilage along the medial facet of the patella with relative sparing of the articular cartilage along the lateral facet. There are small patellofemoral osteophytes. There is full-thickness cartilage loss along the weightbearing portion of the medial femoral condyle and near full-thickness cartilage degeneration along the weightbearing portion of the medial tibial plateau. There is mild subchondral edema type signal within the medial aspect of the medial tibial plateau and medial femoral condyle, which is likely degenerative in etiology. The articular cartilage in the lateral compartment is relatively preserved. There are small medial compartment osteophytes.LIGAMENTS: The cruciate and collateral ligaments appear intact.EXTENSOR MECHANISM: The extensor mechanism appears intact. ADDITIONAL
1. Complex tear of the medial meniscus with displacement of meniscal tissue into the medial gutter as described above.2. Osteoarthritis of the knee.3. Baker's cyst.