Reason: Fall, L knee pain, eval for ligamentous injury History: see above MENISCI: There is linear signal abnormality traversing the posterior horn of the medial meniscus extending to both the tibial and femoral articular surfaces. There is blunting of the posterior horn of the meniscus on the sagittal images. These findings likely represent a small radial tear which extends to involve the body of the meniscus. The anterior horn appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is near full-thickness articular cartilage degeneration along the lateral facet of the patella with near full-thickness articular cartilage loss. There is superficial fraying of the articular cartilage of the lateral facet of the femoral trochlea. There is relative sparing of the medial and lateral compartment cartilage.LIGAMENTS: The collateral ligaments appear intact. There is complete disruption of the ACL, although the lack of surrounding edema may indicate that this is chronic in etiology. The PCL appears intact.EXTENSOR MECHANISM: The extensor mechanism appears intact. The Insall Salvati ratio measures 1.4, indicating patella alta.ADDITIONAL
1. Small radial tear of the medial meniscus as described above.2. Complete disruption of the ACL, which may be chronic in etiology.3. Articular cartilage degeneration and cartilage fissuring affecting the patellofemoral articulation with edema in the superolateral aspect of Hoffa's fat pad, patella alta, and a borderline elevated tibial tubercle to the trochlear groove distance. These findings can be seen in patellofemoral instability.