44-year-old female with constant knee pain and swelling. MENISCI: Note is made of a discoid lateral meniscus. There is linear increased signal abnormality within the posterior horn of the lateral meniscus which is consistent with a horizontal tear of the meniscus. There is blunting and deformity consistent with complex tearing of the posterior horn of the medial meniscus extending into the body of the meniscus. The anterior horn appears intact. ARTICULAR CARTILAGE AND BONE: There is tricompartmental osteophyte formation. There is full thickness articular cartilage degeneration involving nearly the entire weightbearing surface of the medial femoral condyle and medial tibial plateau. There is subchondral signal abnormality in the surrounding area, likely degenerative. There is subjective thinning of the articular cartilage of the lateral compartment. There is near full thickness to full thickness articular cartilage degeneration along the lateral facet of the patella. There is also a partial thickness articular cartilage fissure along the medial facet of the patella. LIGAMENTS: There is thinning and increased signal abnormality within the distal fibers of the ACL suggesting a partial tear. The PCL, MCL, and LCL appear intact.EXTENSOR MECHANISM: Extensor mechanism appears intact.ADDITIONAL
1. Tearing of a discoid lateral meniscus as well as complex tearing of the medial meniscus.2. Degenerative changes including full-thickness articular cartilage degeneration as described above.3. Thinning and increased signal abnormality within the distal fibers of the ACL suggesting a partial tear. 4. Large knee joint effusion with foci of internal fat signal intensity suggesting lipoma arborescens as well as multiple loose bodies within the joint space.