Reason: left knee pain, swelling since injury 2 weeks ago while running History: as above MENISCI: There is linear increased signal abnormality within the posterior horn of the medial meniscus which extends to the femoral and tibial articular surfaces indicating a horizontal tear which extends to involve the body of the meniscus. The anterior horn appears intact. There is focal fluid signal intensity within the anterior horn of the lateral meniscus, near its root, likely representing a meniscal cyst, indicating a tear. There is linear increased signal abnormality within the anterior horn that extends through the peripheral fibers of the body of the meniscus indicating a horizontal tear. The posterior horn appears intact.ARTICULAR CARTILAGE AND BONE: There is focal partial-thickness articular cartilage degeneration along the weightbearing portion of the lateral femoral condyle above the anterior horn of the meniscus. The medial compartment articular cartilage appears relatively spared. There is linear decreased signal abnormality within the articular cartilage of the lateral facet of the patella likely representing a full-thickness articular cartilage fissure with underlying subchondral signal abnormality. There are tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Tearing of the medial and lateral menisci as described above. 2. Osteoarthritis of the knee with articular cartilage degeneration as well as a full-thickness articular cartilage fissure along the patellofemoral articulation. 3. Small amount of fluid along the medial aspect of the proximal tibia may represent a very mild pes anserine bursitis.