17-year-old female with history of right knee pain. MENISCI: There is mildly increased signal intensity within the inner aspect of the posterior horn of the medial meniscus near its root which may represent focal degeneration or mild fraying, but we see no discrete tear. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: The articular cartilage is unremarkable. Bone marrow signal intensity is normal.LIGAMENTS: There is deformity and increased signal intensity of the posterior cruciate ligament compatible with a high-grade partial thickness or full thickness midsubstance tear.EXTENSOR MECHANISM: The extensor mechanism is unremarkable.ADDITIONAL
1.Tear of the PCL.2.No evidence of meniscal or cartilage injury.