17 year old female with pain and swelling. Rule out ligamentous or meniscal injury. MENISCI: There is deformity and displacement of the posterior horn of the medial meniscus with apparent fragments identified adjacent to the anterior horn of the medial meniscus, consistent with a flipped bucket handle tear. The lateral meniscus appears intact. ARTICULAR CARTILAGE AND BONE: Note is made of serpentine signal abnormality within the medial and lateral femoral condyles consistent with osteonecrosis/bone infarcts. There are subchondral cysts in the intercondylar eminence. No full thickness or near full thickness articular cartilage defects are identified. There is bone marrow signal abnormality within the posterior aspect of the medial tibial plateau.LIGAMENTS: There is edema type signal abnormality within and discontinuity of the midsubstance fibers of the ACL suspicious of a complete rupture. The PCL and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intactADDITIONAL
1. Bucket handle tear of the medial meniscus.2. Findings suspicious for complete mid ACL rupture.3. Osteonecrosis of the femur.4. Joint effusion and other findings as described above.