22-year-old male with knee pain. Assess for lateral meniscal injury. MENISCI: There is linear signal abnormality within the body of the lateral meniscus which extends to the femoral articular surface consistent with a horizontal tear which extends to the posterior horn of the meniscus. There is linear increased signal abnormality which extends to the tibial and femoral articular surface consistent with a radial tear within the anterior horn of the lateral meniscus. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is increased signal abnormality within the posterior aspect of the lateral tibial plateau which may represent a bone contusion. There is also increased signal abnormality within the medial aspect of the medial femoral condyle which may represent a contusion. There is heterogeneous bone marrow signal abnormality consistent with residual islands of red marrow. No full-thickness or near full-thickness articular cartilage defects are identified.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact. There is slight thickening of the patellar tendon. There is also increased intermediate signal abnormality within the proximal fibers of the patellar tendon indicating mild tendinosis. The Insall Salvati ratio measures 1.3 suggesting patella alta.ADDITIONAL
1. Horizontal and radial tears of the lateral meniscus as described above.2. Findings suggestive of patellofemoral instability as described above.3. Nonspecific fluid signal abnormality along the posterior aspect of the knee may represent the sequela of a ruptured Baker's cyst.4. Mild patellar tendinosis.