Locking, catching pain. Question of meniscus tear. MENISCI: There is increased signal in the inner one third of the posterior horn of the medial meniscus extending from the tibial to femoral surfaces which likely represents a tear, unchanged. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is thinning of the patellar cartilage. The medial and lateral compartments are intact. Again seen is deformity of the lateral aspect of the patella with an adjacent fracture fragment which is likely post-traumatic. There is subchondral cyst formation within the lateral patella and the adjacent fracture fragment. LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: There is redemonstration of diffuse thickening and heterogeneous signal in the quadriceps tendon which likely represents a combination of tendinosis and posttraumatic/postoperative scarring. Again seen are foci of metallic susceptibility artifact within the distal fibers of the quadriceps tendon. There are three linear foci of intermediate signal intensity extending vertically through the medial, central, and lateral aspects of the patella which presumably represent suture tunnels for tendon reattachment. The medial fibers of the tendon can be followed into the medial tunnel, however, no tendon is seen entering the central or lateral tunnels, similar to the prior study. ADDITIONAL
1. Tearing of the inner 1/3 of the posterior horn of the medial meniscus. 2. Post-traumatic/post-surgical changes of the quadriceps tendon and post-traumatic changes of the lateral patella. 3. Thinning of the patellar cartilage. 