Female 57 years old Reason: ? meniscal injury History: Knee pain. MENISCI: Complex tear of the posterior horn of the medial meniscus. This consists of a large radial component involving the inner two thirds of the meniscus. Lateral to this the root of the posterior horn appears unusually large which likely represents displaced adherent meniscal tissue. Additional signal is noted more medially within the posterior horn. The anterior horn and body of the medial meniscus is relatively preserved. There is slight medial extrusion of the body. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is diffuse thinning of the articular cartilage of the weight-bearing portion the medial femoral condyle with possible full-thickness degeneration along the medial tibial plateau. Mild subchondral edema type signal within the far medial aspect of the medial femoral condyle is likely degenerative in etiology. The articular cartilage of the lateral compartment is relatively preserved. There is a subcentimeter full-thickness defect of the articular cartilage of the medial facet of the femoral trochlea. A subcentimeter linear focus of intermediate signal intensity that appears to arise from the superior aspect of the trochlear cartilage may represent a displaced trochlear cartilage flap.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Complex tear of the posterior horn of the medial meniscus.2. Cartilage defect/degeneration as described above.3. Moderate size joint effusion and small Baker's cyst.