40-year-old male with left knee pain. Evaluate healing of OATS and microfracture. Again seen are extensive postoperative changes, including orthopedic screws in the proximal tibia, that result in metallic susceptibility artifact and poor fat saturation. Additional extensive artifact anteriorly may reflect suture material or metallic shavings.MENISCI: Again seen is attenuation of the posterior horn and body of medial meniscus suggesting prior meniscectomy, appearing similar to the prior study. We see no fluid signal intensity entering the meniscus to suggest a tear. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: Again seen is scalloping of the femoral trochlea centrally, presumably representing a site of OATS allograft/microfracture that appears to be largely filled with articular cartilage with minimal surface irregularity, appearing similar to the prior study. There is mild to moderate thinning of the remaining articular cartilage along the medial and lateral facets with small osteophytes, appearing similar to the prior study. There are patellar osteophytes with mild thinning of the articular cartilage superiorly and inferiorly, appearing similar to the prior study. We see no fluid-filled articular cartilage defects. There is slight progression of degeneration of the articular cartilage of the medial femoral condyle with increase in signal heterogeneity, particularly along the medial aspect of the weightbearing portion of the condyle. There is mild edema type signal in the underlying subchondral bone which is also new and likely degenerative in etiology. There is cartilage degeneration along the medial femoral condyle above the posterior horn of the medial meniscus, appearing similar to the prior study. There is also progression of degeneration of the articular cartilage of the far medial aspect of the weightbearing portion of the medial tibial plateau with new degenerative edema type signal abnormality in the underlying subchondral bone. Articular cartilage of the lateral compartment is relatively spared, although there are lateral compartment osteophytes with mild thinning of the overlying cartilage.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Postoperative changes as described above. There is tricompartmental osteoarthritis with slight progression of cartilage degeneration of the medial compartment. The postoperative changes of the patellofemoral compartment appear similar to the prior study.