History of snowboarding injury now with medial swelling, pain, limited extension, and inability to bear weight. MENISCI: The menisci appear intact.ARTICULAR CARTILAGE AND BONE: The articular cartilage appears intact. Streaky foci of increased signal intensity seen on fluid sensitive sequences within the lateral tibial condyle likely represent confluence of blood vessels. Bone marrow signal intensity is otherwise within normal limits.LIGAMENTS: The cruciate ligaments appear intact. Edema along the superficial band of the MCL indicates a sprain. Edema extends along the medial retinaculum likely representing additional sprain injury. The lateral collateral ligament complex is intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
MCL sprain and joint effusion.