41-year-old male status post left knee dislocation and multi ligamentous injury. MENISCI: The lateral meniscus appears intact. There is increased globular signal abnormality within the posterior horn and body of the medial meniscus suggesting intrasubstance degeneration. Some of this signal extends to the tibial articular surface indicating undersurface fraying/degenerative tearing. The anterior horn appears intact.ARTICULAR CARTILAGE AND BONE: There are focal full-thickness articular cartilage defects centrally as well as along the medial and lateral facets of the patella, with underlying subchondral signal abnormality. There is an apparent full-thickness articular cartilage cleft along the medial facet of the femoral trochlea. The articular cartilage of the medial tibiofemoral compartment appears relatively spared, as is the cartilage along the lateral tibiofemoral compartment.LIGAMENTS: There is disruption of the ACL. There is complete rupture of the PCL. There is indistinctness and increased signal abnormality within the proximal fibers of the lateral collateral ligament proper indicating a tear. The IT band and biceps femoris appear intact. The medial collateral ligament appears intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Complete rupture of the ACL and PCL. Indistinctness of the proximal fibers of the lateral collateral ligament proper, indicating a tear.2. Focal full-thickness articular cartilage defects affecting the patellofemoral joint. Other findings as described above.3. Elevated tibial tubercle to trochlear groove distance with measurements provided above which may be post traumatic in etiology.4. Nonspecific edema type signal abnormality within the tibialis anterior muscle as described above.