Left knee effusion, pain and popping; concern for meniscal injury MENISCI: There is globular signal within the anterior horn and body of the lateral meniscus indicating intrasubstance degeneration with extrusion of mucoid material into the adjacent soft tissues resulting in formation of tiny parameniscal cysts. Best seen on the T2-weighted sagittal series is additional linear signal abnormality extending to the femoral articular surface indicating a horizontal tear. I suspect that there is mild fraying of the free edge of the posterior horn of the lateral meniscus, but I see no discrete tear of the posterior horn. The lateral meniscus appears normal for age.ARTICULAR CARTILAGE AND BONE: There is focal but full-thickness delamination of the articular cartilage of the medial femoral condyle just anterior to the posterior horn of the medial meniscus, and an additional small full-thickness articular cartilage defect is noted slightly more anteriorly. There is superficial degeneration of the articular cartilage of the weightbearing portion of the medial tibial plateau with tiny foci of degenerative signal abnormality in the underlying subchondral bone. The articular cartilage of the lateral and patellofemoral compartments is relatively well preserved, appearing normal for age. There are small osteophytes.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Degenerative tearing of the anterior horn and body of the medial meniscus with formation of tiny para meniscal cysts.2.Cartilage degeneration as described above.