Effusion. Question of intra-articular injury. MENISCI: The lateral and medial menisci are intact.ARTICULAR CARTILAGE AND BONE: There is extensive multifocal chondromalacia, similar in distribution as the prior examination. There is redemonstration of a focal fissure in the weight-bearing portion of the lateral femoral condyle, appearing similar to prior study (image 21, series 601). Additionally, there is a 2-mm full-thickness chondral defect of the posterior lateral femoral condyle, (image 21, series 601). More anteriorly along the lateral femoral condyle there is cartilage thinning with multiple associated small subchondral cysts and focal marrow edema that is similar to the prior exam.There is a new full-thickness chondral defect measuring approximate 20 x 20 mm of the weight-bearing portion of the medial femoral condyle (image 10, series 601 and image 19, series 801).There is redemonstration of complete cartilage loss of the lateral patella articular surface with denuding of the lateral 50% of the lateral femoral trochlea articular surface. Additionally there is mild thinning and fraying of the medial patellar articular surface inferiorly.LIGAMENTS: The collateral and cruciate ligaments are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Multifocal chondromalacia with new large full-thickness chondral defect of the medial femoral condyle.2. Moderate joint effusion.