Reason: chronic lateral patellar dislocation History: lateral patellar dislocation. Due to patient's body habitus, the high-resolution coil could not be used. An alternative coil was used resulting in slightly suboptimal images. MENISCI: Small foci of increased signal intensity within the root of the posterior horn of the medial meniscus of questionable clinical significance, but we see no definite tear.Intrasubstance abnormal signal in the posterior horn of the lateral meniscus indicating degeneration, but we see no discrete tear.ARTICULAR CARTILAGE AND BONE: Chronic lateral dislocation of the patella. Although evaluation of the articular cartilage is limited, there appears to be full-thickness loss of cartilage along the medial facet of the patella and near full-thickness cartilage loss more focally along the lateral facet of the patella. Femoral trochlea is shallow compatible with dysplasia. Trochlear cartilage appears relatively intact. There are small patellofemoral osteophytes.The tibial tuberosity-trochlear groove distance is 2 cm.Osteophyte formation with overlying full-thickness cartilage loss along the anterior aspect of the lateral femoral condyle. Also moderate degeneration is apparent along the weightbearing surface of the lateral femoral condyle and perhaps the anterior aspect of the lateral tibial plateau.Articular cartilage of the medial compartment is intact.LIGAMENTS: The ACL is intact. The PCL is intact. The MCL is intact. The LCL complex is intact.EXTENSOR MECHANISM: The quadriceps and patellar tendons are intact.ADDITIONAL
Chronic lateral patellar dislocation with osteoarthritic changes and other findings as described above.