16-year-old female with tenderness to palpation of the right knee. Evaluate for meniscal tear. MENISCI: Undulation of the free edge of the body of the lateral meniscus appears most consistent with meniscal flounce. The medial meniscus appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is slight increased signal abnormality on fluid sensitive sequences within the lateral femoral condyle consistent with a subacute bone contusion. There is anterior translation of the tibia relative to the femur. The femoral trochlea appears shallow superiorly, suggesting a mild femoral trochlear dysplasia. There is slight lateral translation of the patella relative to the femoral trochlea.LIGAMENTS: The ACL is indistinct indicating a tear involving the proximal and mid substance fibers. There is minimal increased signal abnormality on the fluid sensitive sequences suggesting this finding may be subacute in etiology. The PCL appears intact. The MCL and LCL appears intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Subacute tearing/rupture of the ACL.2. Bone contusion of the lateral femoral condyle.3. Nonspecific subcutaneous edema along the anterior aspect of the knee. 4. Small joint effusion.5. Findings suggestive of a mild femoral trochlear dysplasia as described above. 