29-year-old female with persistent knee pain. History of right knee tibial tubercle osteotomy. Metallic susceptibility artifact from orthopedic fixation of the proximal tibia results in suboptimal image quality.MENISCI: The medial and lateral meniscus appear intact.ARTICULAR CARTILAGE AND BONE: Note is made of postoperative changes consistent with the stated history of tibial tubercle osteotomy. There is partial-thickness articular cartilage degeneration along the lateral facet of the patella. There is a focal full-thickness articular cartilage cleft along the lateral facet of the patella. There is partial-thickness articular cartilage degeneration along the medial facet of the patella. The femoral trochlea is shallow, superiorly, suggesting femoral trochlear dysplasia. Heterogeneous bone marrow signal abnormality may represent residual islands of red marrow. There is subjective thinning of the articular cartilage of the lateral tibiofemoral compartment.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Postoperative changes of prior tibial tubercle osteotomy. Partial-thickness articular cartilage degeneration affecting the patellofemoral joint, including a full-thickness articular cartilage cleft, as well as findings consistent with femoral trochlear dysplasia as described above.