Female 51 years old Reason: r/o meniscus tear History: injured left knee while hiking in Colorado. Problem with flex at the knee MENISCI: There is blunting of the inner margin of the posterior horn and body of the medial meniscus consistent with tearing. The lateral meniscus is intact. The lateral meniscus is partially extruded.ARTICULAR CARTILAGE AND BONE: There is a full-thickness focal articular cartilage defect in the midline trochlear groove with underlying T2 hyperintensity indicating marrow edema and subchondral cyst formation (series 701, image 12; series 501 image 17). Fraying of the patellar articular cartilage along the lateral facet and apex without focal defect. LIGAMENTS: Ligaments are intact. Degenerative change and cystic formation at the insertion of the ACL on the tibia and to a lesser extent the tibial insertion of the PCL.EXTENSOR MECHANISM: Extensor mechanism is intact. ADDITIONAL
1.Tear of the posterior horn and body of the medial meniscus as detailed above.2.Full-thickness focal articular cartilage defect in the midline trochlear groove with underlying marrow edema and cystic change.3.Other degenerative changes as detailed above.4.Moderate size Baker's cyst.