30-year-old male with history of meniscal injury, partial ACL tear now with recent injury and pain along the medial jointline. Inability to bear weight and decreased range of motion with flexion. MENISCI: The medial meniscus appears intact. There is increased signal abnormality within the posterior horn of the lateral meniscus. Some of this extends to the tibial articular surface suggestive of superficial tearing/fraying (image 21; series 10). No fluid-filled tear is identified.ARTICULAR CARTILAGE AND BONE: There is increased signal abnormality within the lateral femoral condyle on fluid sensitive sequences which may represent a bone contusion. No full-thickness or near full-thickness articular cartilage defects are identified.LIGAMENTS: Increased signal abnormality about the ACL on fluid sensitive sequences suggesting a sprain or partial tearing of the proximal fibers. The PCL appears intact. The LCL appears intact. There is increased signal abnormality on fluid sensitive sequences within the proximal fibers of the superficial band of the MCL, anteriorly, indicating partial tearing. There is fluid within the MCL bursa indicating a bursitis. There is nonspecific subcutaneous edema in the surrounding area.EXTENSOR MECHANISM: The extensor mechanism appears intact. There is a small amount of increased signal abnormality within the proximal fibers of the patellar tendon which may represent a very mild patellar tendinosis.ADDITIONAL
1. Partial tear of the MCL. 2. Partial tearing/sprain of the ACL. 3. Superficial fraying/tearing of the posterior horn of the lateral meniscus. No fluid-filled tear is evident.4. Bone contusion within the lateral femoral condyle.5. Moderate sized joint effusion.