37-year-old male patient with left knee pain status post injury two weeks ago. Assess for medial meniscal tear. MENISCI: The medial and lateral menisci appear grossly intact.ARTICULAR CARTILAGE AND BONE: There is marked thinning of the lateral patellar facet articular cartilage, with mild underlying bone edema, and fraying of the adjacent medial patellar facet. There is fraying/thinning of the femoral trochlear articular cartilage. There is heterogeneous signal within the anterior weightbearing portion of the lateral femoral condyle articular cartilage indicating degeneration with generalized thinning.Bone marrow edema is present within the posterior aspect of the medial femoral condyle and to a lesser degree the posterior aspect of the medial tibial plateau. Small tricompartmental osteophytes are noted.LIGAMENTS: The anterior and posterior cruciate ligaments are intact. Popliteus muscle and tendon are intact. The collateral ligaments are intact.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Bone contusion of the medial compartment.2. Chondromalacia predominately affecting the patellofemoral compartment.3. Possible loose body.4. Intact ligamentous and meniscal structures. 