78-year-old male. Left lateral knee pain. Evaluation of lateral fluctuant mass previously evaluated by ultrasound without conclusive characterization. MENISCI: The body and posterior horn of the medial meniscus are torn and flipped into the intercondylar notch in front of the PCL, consistent with a bucket handle tear. Complex branching signal abnormality in the body and lateral aspect of the posterior horn of the medial meniscus consistent with a complex tear; the medial aspect of the posterior horn is not visualized towards its insertion consistent with a component of complete radial tearing.LIGAMENTS: The ACL is not visualized consistent with a complete tear. The PCL, MCL, and LCL are intact.ARTICULAR CARTILAGE AND BONE: Marked diffuse articular cartilage thinning of the lateral femoral condyle with areas of full-thickness cartilage loss anteriorly. Large areas of full thickness cartilage loss of the weight bearing surfaces of the medial tibiofemoral compartment. Marked diffuse cartilage thinning of the patellofemoral compartment articular cartilage with full thickness cartilage loss of the lateral patellar facet.Underlying subchondral marrow edema and cysts in the tibia and femur are most likely degenerative in etiology. EXTENSOR MECHANISM: Intact.ADDITIONAL
1. Large bucket handle tear of the medial meniscus. Complex tear of the body and posterior horn of the lateral meniscus.2. Complete tear of the ACL.3. Palpable abnormality at the lateral joint line is likely due to a combination of ganglion cysts and a small hematoma.