27-year-old male with pain and effusion. Evaluate for soft tissue injury or meniscal injury. MENISCI: There is linear increased signal abnormality within the posterior horn of the medial meniscus which extends to the femoral articular surface consistent with a horizontal tear. There is blunting of the body of the meniscus suggesting extension of the aforementioned tear. The anterior horn appears intact. There is increased signal abnormality within the body of the lateral meniscus which is slightly blunted suggestive of fraying/tearing of the free edge of the body of the meniscus. The posterior and anterior horns appear intact.ARTICULAR CARTILAGE AND BONE: There is subchondral edema within the posterior aspect of the medial tibial plateau which may represent a contusion. There is also increased bone marrow signal abnormality within the lateral femoral condyle and posterior aspect of the lateral tibial plateau also consistent with contusions. There is a focal full-thickness articular cartilage defect along the weightbearing surface of the lateral femoral condyle, above the body of the meniscus, with underlying subchondral signal abnormality.LIGAMENTS: There is rupture of the proximal and mid substance fibers of the ACL. The PCL appears intact. The MCL and LCL appear intact.EXTENSOR MECHANISM: The Insall-Salvati ratio measures 1.3 suggesting patella alta. The tibial tubercle to trochlear groove distance is within normal limits. The extensor mechanism appears intact.ADDITIONAL
1. Tearing of the medial meniscus.2. Fraying/tearing of the free edge of the body of the lateral meniscus.3. Rupture of the ACL.4. Large joint effusion and focal articular cartilage defect along the lateral femoral condyle as well as other findings as described above.