17-year-old male with history of tibial OCD lesion. MENISCI: There is tearing and fraying through the free edge of the body of the lateral meniscus (image 24 series 6). The medial meniscus is small, however it is intact.ARTICULAR CARTILAGE AND BONE: Again seen is a heterogeneous lesion containing small cysts in the lateral tibial plateau extending to the articular surface with a maximal axial dimensions of 1.3 x 1.2 cm (image 23 of series 3). There is been mild subchondral collapse in the interim with a full-thickness osteochondral cleft measuring 4mm in depth(image 23 of series 6). There is mild adjacent edema signal abnormality. There is increased signal abnormality within the overlying cartilage of the lateral tibial plateau.LIGAMENTS: The ACL, PCL, MCL, and LCL complex are intact. EXTENSOR MECHANISM: There is a vertically oriented short segment partial-thickness tear through the distal patellar tendon with maximal mediolateral thickness of 3 mm. Patella alta again noted. Insall-Salvati ratio measures approximately 1.5. The tibial tubercle trochlear groove distance appears normal, however the femoral trochlea appears slightly shallow. Mild lateral subluxation of the patella in relation to the trochlear groove.ADDITIONAL
1. OCD lesion of the lateral tibial plateau with mild subchondral collapse which has progressed from prior. Increased signal within the articular cartilage likely indicates early degeneration.2. Free edge tear of the body of the lateral meniscus.3. Chronic partial thickness patellar tendon tear and patella alta.4. Mild lateral subluxation of the patella and shallow femoral trochlea.