Left knee pain. MENISCI: There is attenuation of the body and horns of the medial meniscus that we suspect reflects interval partial meniscectomy. There is horizontally oriented intermediate signal within the anterior horn of the medial meniscus that extends to the femoral articular surface. While we cannot exclude the possibility of a tear, this may simply reflect residual intrasubstance signal following partial meniscectomy. There is also mild deformity of and signal abnormality along the undersurface of the posterior horn of the medial meniscus, but it is difficult to determine to what degree this represents sequela of meniscectomy versus degenerative undersurface tearing. We see no unstable meniscal fragment. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is now severe loss of cartilage affecting the medial compartment with much of the weightbearing surface of the medial femoral condyle and medial tibial plateau devoid of articular cartilage. There is slight focal depression of the weightbearing articular surface of the medial femoral condyle and mild underlying marrow edema. The articular cartilage of the lateral compartment appears relatively spared. Moderate osteoarthritis affects the patellofemoral joint and appears similar to the prior study. Cysts within the tibial plateau anterior to the PCL attachment appear similar to the prior study.LIGAMENTS: There is a small amount of fluid and edema along the medial collateral ligament that we suspect is associated with underlying medial compartment osteoarthritis although this could conceivably represent sprain if there is a history of recent trauma. The lateral collateral ligament complex is intact although there is mild nonspecific edema superficial to the iliotibial band extending into the subcutaneous fat of the lower leg.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1.Marked progression of cartilage loss affecting the medial compartment with osteoarthritis of the patellofemoral joint appearing similar to the prior study.2.Findings suggestive of partial meniscectomy as described above.3.Other findings as described above.