33-year-old male with effusion, lateral pain and tender to palpation one week after hit by car MENISCI: Intermediate signal within the posterior horn of the medial meniscus may represent intrasubstance degeneration without evidence of discrete tear. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: Edema type signal is noted within the lateral femoral condyle and lateral aspect of the patella. Articular cartilage is within normal limits.LIGAMENTS: The cruciate and collateral ligaments are intact.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Bone marrow edema within the lateral femoral condyle and the lateral aspect of the patella without evidence of fracture or ligamentous injury. 2.Intrasubstance degeneration within the posterior horn of the medial meniscus without evidence of discrete tear.3.Small joint effusion.