Male 28 years old with knee pain for 6 weeks after Frisbee injury. Joint pain, clicking, lateral and posterior medial joint line pain. Also pain over the medial hamstring. MENISCI: There is a horizontal tear of the posterior horn of the medial meniscus with extension to the superior articular surface. The anterior horn of the medial meniscus and the lateral meniscus are intact.ARTICULAR CARTILAGE AND BONE: Low T1 and increased T2 signal is seen in the posterior tibial plateau compatible with a bone contusion. There is no evidence of acute fracture.The articular cartilage in all 3 compartments is intact.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Tear of the posterior horn of the medial meniscus.2.Baker's cyst.3.The cruciate and collateral ligaments are intact.