Check for meniscal tear or Baker's cyst. Knee swelling MENISCI: The menisci are intact and unremarkable. Old demonstrate proper anchoring posteriorly. However, extensive multilobulated cysts are observed posteriolateral to the lateral meniscus and displacing the lateral head of the gastrocnemius. Additional similar cysts are observed posterior to the medial condyles and epiphyseal plate, compatible with ACL ganglion cysts.ARTICULAR CARTILAGE AND BONE: Moderate thinning with underlying contusion involving the patellofemoral compartment, specifically the medial facet. The remaining compartments are otherwise unremarkable. Marrow signal is normal. Small bone island observed in the medial femoral condyle.LIGAMENTS: No significant abnormality noted. Specifically the ACL appears intact with discrete fibers.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
Multiple scattered para-meniscal and ACL ganglion cysts involving largely the postero-medial and lateral aspects of the knee. See detail provided