Right knee pain MENISCI: There is truncation of the anterior horn of the lateral meniscus which likely relates to prior partial meniscectomy. Otherwise the lateral meniscus is intact. There is abnormal signal within the posterior horn of the medial meniscus with extension to the superior articular surface concerning for tear. The anterior horn and body appear intact.ARTICULAR CARTILAGE AND BONE: There is diffuse thinning of the articular cartilage of the lateral compartment without discrete full-thickness defect. Similar but more severe areas of thinning are also noted in the medial compartment with scattered areas of partial-thickness defects noted in the medial femoral condyle posteriorly and near the intercondylar notch. Degenerative cystic changes are noted in the tibial plateau posteriorly at the level of the posterior horn of the meniscus. Moderate diffuse cartilage thinning of the patellofemoral compartment is also noted with areas of near full-thickness to full-thickness defects in the lateral patellar facet and femoral trochlea centrally.LIGAMENTS: There is evidence of prior ACL reconstruction, although the ACL graft is torn. The PCL is intact. The MCL and LCL are intact.EXTENSOR MECHANISM: Enthesopathic changes are noted in the distal quadriceps tendon which is otherwise intact. The patellar tendon is intact.ADDITIONAL
1. Ruptured ACL graft.2. Abnormal signal within the posterior horn of the medial meniscus concerning for tear.3. Diffuse tricompartmental thinning of the articular cartilage with areas of partial-thickness to near full-thickness defects of the medial and patellofemoral compartments.4. Large joint effusion.