15-year-old male with knee injury MENISCI: The medial and lateral menisci are intact.ARTICULAR CARTILAGE AND BONE: There is an avulsed 1.3 cm fracture fragment of the posterior tibial plateau at the attachment of the PCL. Edema extends within the medial and lateral tibial plateau. The patellofemoral cartilage is intact. The tibiofemoral cartilage is intact.LIGAMENTS: The ACL is intact. The fibers of the PCL are intact with an avulsion fracture of the tibial attachment as described above. The MCL and LCL are intact.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Avulsion fracture at the tibial insertion of the PCL. 2. Large hemarthrosis. 3. Intact menisci and collateral ligaments.