Female, 55 years old. Right knee pain and instability. MENISCI: There is blunting of the anterior horn of the medial meniscus at the apical margin consistent with fraying of the medial edge. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is bone marrow edema within the medial aspect of medial femoral condyle and the posterior patella. There is a focal articular defect along the anterior femoral condyle. There is also a focal defect of the articular cartilage along the lateral facet of the patella near the apex. LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: There is decreased signal within the medial retinaculum which may represent a sprain. The quadriceps and patellar tendons appear intact.ADDITIONAL
Questionable patellar dislocation with constellation of findings as described above.