Right knee pain, meniscal tear versus loose body MENISCI: There is blunting of the free edge of the body of the medial meniscus which is new from the prior exam and likely represents inner edge fraying/tearing. The anterior and posterior horns of the medial meniscus are intact.There is poorly defined increased signal throughout the lateral meniscus representing extensive degeneration and degenerative tearing. Additionally, there appears to be a vertically oriented tear of the posterior horn with blunting of the free edge of the anterior horn that could reflect interval tearing or the sequela of partial meniscectomy. There is further lateral extrusion of the body of the lateral meniscus with deformity of the contour likely representing a combination of degeneration and tearing.ARTICULAR CARTILAGE AND BONE: The full-thickness defect of the articular cartilage of the medial femoral condyle previously seen on the prior exam is no longer evident. This has instead been replaced with an osseous protuberance measuring approximately 15 mm in width and 4 mm in depth and likely represents the site of interval microfracture surgery. The articular cartilage overlying the bony protuberance is thinned and there is a focal full-thickness defect of the articular cartilage immediately medial to this protuberance measuring approximately 5 mm. Additional heterogeneity of the remaining articular cartilage of the medial femoral condyle suggests mild degeneration. There is also focal degeneration of the articular cartilage of the medial tibial plateau immediately posterior to the truncated body of the medial meniscus. There is mild edema type signal within the subchondral bone of the medial femoral condyle as well. There has been progression of cartilage degeneration of the lateral compartment with portions of the weightbearing surface of the lateral tibial plateau essentially devoid of articular cartilage. There has also been progression of subchondral cystic change although the subchondral edema within the tibial plateau is not as prominent. Furthermore, there has been progression of thinning of the articular cartilage of the lateral femoral condyle posteriorly with areas of full-thickness degeneration.There is moderate degeneration of the articular cartilage of the patellofemoral joint which has also progressed from the prior exam with areas of new full-thickness clefts in the femoral trochlea.There is also progression of osteoarthritis of the proximal tibiofibular joint.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
Tricompartmental progression of osteoarthritis with meniscal tears and other findings described above. No discrete loose body is identified within the joint.