16-year-old male with history of rotational trauma 4 weeks ago and pain. Evaluate for lateral meniscal tear. MENISCI: The medial meniscus is normal in signal and morphology. There is mild blunting of the free edge of the posterior horn and body of the lateral meniscus; there is no definite increased signal extending to the articular surfaces.ARTICULAR CARTILAGE AND BONE: Mildly increased T2 signal within the lateral femoral condyle and posteriolateral aspect of the lateral tibial plateau compatible with mild edema. Otherwise, no evidence of acute fracture. No evidence of articular cartilage defects.LIGAMENTS: Mildly increased T2 signal within the anterior cruciate ligament fibers which may represent a mild sprain; otherwise, the anterior and posterior cruciate ligaments are intact. The collateral ligaments are intact.EXTENSOR MECHANISM: The quadriceps mechanism is intact.ADDITIONAL
1.Blunting of the free edge and body of the posterior horn of lateral meniscus without discrete tear.2.Moderate size knee joint effusion.3.Mild osseous contusions involving the lateral femoral condyle and posteriolateral tibial plateau.