22-year-old male with left knee pain and swelling. MENISCI: The menisci appear intact.ARTICULAR CARTILAGE AND BONE: There is bone marrow signal abnormality in the lateral femoral condyle and lateral tibial plateau consistent with bone contusions. No full-thickness or near full-thickness articular cartilage defects are identified.LIGAMENTS: There is disruption of the superficial fibers of the medial collateral ligament. There is increased signal abnormality within the deep fibers of the medial collateral ligament with possible disruption at the level of its insertion on the medial femoral condyle. There is a small amount of fluid within the MCL bursa. The cruciate ligaments appear intact. The lateral collateral ligament complex appears intact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Disruption of the MCL with associated bone contusions along the lateral tibiofemoral compartment and other findings as described above.