known tibial spine avulsion injury. Evaluate meniscal/cartilage injury. MENISCI: Increased signal seen in the posterior horn of the medial meniscus does not definitively extend to the articular cartilage, however a partial tear cannot be excluded. Increased signal seen in the anterior and posterior horns of the lateral meniscus, anterior greater than posterior, extending to the articular cartilage and are compatible with a tear.ARTICULAR CARTILAGE AND BONE: An avulsion fracture of the tibial spine is located in the intracondylar notch. Increased signal abnormalities in the lateral femoral condyle, medial tibial plateau and posterior lateral tibial plateau are compatible with bone contusions.LIGAMENTS: The anterior cruciate ligament is thickened and demonstrates increased laxity with signal changes, a partial tear cannot be excluded. The posterior cruciate ligament, lateral collateral and medial collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Tibial spine avulsion fracture.2.Thickened and lax anterior cruciate ligament with signal abnormalities may reflect a partial ACL tear.3.Lateral meniscal tear as described above. Increased signal abnormality in the posterior horn of the medial meniscal may represent a partial medial meniscal tear.