Female 66 years old with intractable knee pain. Evaluate for avascular necrosis. MENISCI: There is a complex tear of the body and posterior horn of the medial meniscus with a horizontal component contacting the tibial articular surface (series 901, image 8) and a radial component near the anchor (series 1001, image 17). The anterior horn of the medial meniscus and the lateral meniscus are intact.ARTICULAR CARTILAGE AND BONE: There is thinning and fraying of the articular cartilage of the femoral trochlea and areas of full-thickness cartilage loss along the medial patellar facet and patellar eminence. There is associated reactive marrow change in both patella and the femur.There is a focal full-thickness fissure along the weightbearing surface of the medial femoral condyle (series 901, image 11). The articular cartilage of the medial tibial plateau is thinned but without full thickness defect. The articular cartilage in the lateral compartment is relatively preserved. There are small tricompartmental osteophytes.Outside of the reactive marrow changes described above, the bone marrow signal intensity is within normal limits with no findings to suggest avascular necrosis or acute fracture.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Complex tear of the posterior horn of the medial meniscus as described above.2.Areas of full-thickness cartilage loss in the medial femoral condyle and patella.3.Mild osteoarthritis.4.No findings to suggest avascular necrosis or acute fracture.