Reason: eval for meniscus tear, loose body History: pain MENISCI: The medial meniscus appears intact. There is linear increased signal abnormality within the anterior horn of the lateral meniscus indicating a complex degenerative tearing with a large horizontal component that extends into the body of the meniscus. Low signal intensity debris within the lateral synovial recess, likely represents displaced meniscal fragments. There is superficial fraying/degenerative tearing along the tibial surface of the posterior horn of the lateral meniscus.ARTICULAR CARTILAGE AND BONE: There is a focal near full-thickness to full-thickness articular cartilage defect along the lateral femoral condyle above the posterior horn of the meniscus. There is superficial fraying of the articular cartilage along the weightbearing surface of the lateral femoral condyle as well. There is full-thickness articular cartilage degeneration along the lateral tibial plateau. The medial compartment articular cartilage appears relatively spared. There is full-thickness articular cartilage cleft as well as partial-thickness articular cartilage degeneration along the lateral facet of the patella with underlying subchondral cyst formation and degenerative subchondral signal abnormality. There is superficial fraying of the articular cartilage along the medial facet of the patella. There is increased bone marrow signal abnormality within the lateral femoral condyle and lateral tibial plateau which may reflect a combination of degenerative change and bone contusions. There are tricompartmental osteophytes.LIGAMENTS: There is thickening and increased signal intensity within the proximal fibers of the lateral collateral ligament proper indicating a sprain. The LCL appears intact. The MCL appears intact. The ACL and PCL appear intact.EXTENSOR MECHANISM: The extensor mechanism appears intactADDITIONAL
1. Complex tearing of the lateral meniscus with a flipped meniscal fragment as described above.2. Focal full-thickness articular cartilage defects/clefts and articular cartilage degeneration as described above. Osteoarthritis of the knee.3. Sprain of the lateral collateral ligament proper.4. Moderate-sized joint effusion with Baker's cyst.5. 11 mm loose body and other findings as described above.