16-year-old male with left knee pain and instability MENISCI: No significant abnormality noted.ARTICULAR CARTILAGE AND BONE: Linear T1 hypointensity along the medial tibial plateau with associated vague T2 edema type signal. Subtle linear T1 hypointensity in the anterior medial femoral condyle with associated vague T2 edema type signal with mild notching of the femoral condyle.There is mild apparent grade 1-2 chondromalacia of the lateral femoral condyle articular cartilage along the central weightbearing surface.LIGAMENTS: There is mild edema type signal within the ACL and PCL although the fibers are grossly intact. The MCL is intact. The lateral collateral ligament complex is intact. EXTENSOR MECHANISM: The extensor mechanism is intact. ADDITIONAL
1.Linear T1 hypointensities and associated edema type signal in the medial tibial plateau and femoral condyle suggest impaction injury/fracture. Additional findings of a hyperextension mechanism injury as detailed above. 2.Mild edema type signal within the ACL and PCL although the fibers are intact.