Reason: eval for acl tear; chondromalacia and medial retinaculum tear History: knee pain and instability and history of dislocations for years MENISCI: Globular signal within the medial meniscus is consistent with intrasubstance degeneration but we see no discrete meniscal tear. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is fraying of the articular cartilage of the weightbearing portion of the medial compartment. There is also fraying of the articular cartilage of the lateral tibial plateau along the intercondylar eminence. The femoral trochlea is shallow, indicating dysplasia. We see no bone marrow edema.LIGAMENTS: The collateral and cruciate ligaments appear intact. EXTENSOR MECHANISM: The quadriceps and patellar tendons are intact. We see no fluid signal intensity traversing the medial retinaculum. However, there is ossification along the medial facet of the patella, presumably reflecting old injury to the retinaculum at its insertion. ADDITIONAL
1. Femoral trochlear dysplasia. Ossification along the medial facet of the patella presumably represents prior injury at this site given the history of prior patellar dislocation.2. Articular cartilage degeneration as described above.3. Normal-appearing ACL.