54-year-old female with left knee pain for 6 months, assess for medial meniscus tear, patellofemoral chondromalacia MENISCI: On the coronal T1-weighted images, there is a globular increased signal intensity within the body of the medial meniscus indicating intrasubstance degeneration. This signal extends to the tibial articular surface, which may represent undersurface fraying, but we see no discrete fluid-filled meniscal tear. Intrasubstance signal in the lateral meniscus also appears degenerative, without discrete meniscal tear.ARTICULAR CARTILAGE AND BONE: Severe osteoarthritis affects the patellofemoral joint with much of the medial facet of the patella and the trochlea of the femur devoid of cartilage. There is increased signal of the underlying subchondral bone, which is likely degenerative in etiology. Loss of cartilage along the inferior aspect of the lateral facet of the patella is also noted. There is relative preservation of the articular cartilage in the medial and lateral tibiofemoral compartments. Note is made of tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Severe osteoarthritis of the patellofemoral joint, particularly affecting the medial facet of the patella and the trochlea.2. Intrasubstance degeneration of the menisci with possible undersurface fraying of the body of the medial meniscus, but no discrete meniscal tear is evident.