Pain lateral left knee. Question of new or recurrent damage to the articular cartilage of the lateral condyle or lateral meniscus. MENISCI: There is slight blunting of the free edge of the posterior horn of the lateral meniscus which may reflect mild inner edge fraying or interval partial meniscectomy. However, we see no findings of an unstable lateral meniscal tear. The medial meniscus appears intact. The root is slightly ill-defined, but this is unchanged from the prior study.ARTICULAR CARTILAGE AND BONE: The articular cartilage of the lateral tibial plateau anterior to the posterior meniscal horn appears slightly thickened on the current study compared to the prior study, likely reflecting results from interval microfracture. There is heterogeneity and increased signal intensity of the articular cartilage in this region which could reflect degeneration but the clinical significance remains uncertain. We see no definite fluid-filled defect of the cartilage. A small subchondral focus of signal abnormality in the lateral tibial plateau is likely related to a combination of microfracture and degeneration. There is progression of thinning of the articular cartilage along the weight-bearing portion of the lateral femoral condyle indicating degeneration although we see no definite fluid-filled full thickness defects. Small foci of signal abnormality in the underlying bone likely represent sequela of microfracture. The medial compartment articular cartilage is normal. There is a full thickness fissure through the articular cartilage of the medial trochlea, which was not present previously.LIGAMENTS: The patient is status post ACL reconstruction. The graft appears intact. The posterior cruciate ligament is intact. The collateral ligaments are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Findings compatible microfracture of the lateral tibia/femur as described above.2. Minimal blunting of the free edge of the posterior horn of the lateral meniscus may represent mild fraying or interval surgery, but we see no evidence of an unstable tear.3. New full-thickness fissure of the trochlear cartilage as described above.4. Other findings as above.