Knee Flexum Revealing Anterior Cruciate Ligament Ganglion Cyst in an 11-Year-Old Child

Abstract

Case: We report the case of an 11-year-old child who presented with knee pain and moderate limp associated with knee flexum, without trauma history. Radiographic investigations including a magnetic resonance imaging showed a large cyst that seemed to have developed anteriorly from the anterior cruciate ligament, causing the loss of terminal extension, mimicking a cyclops syndrome-like of the knee. Knee arthroscopy with debridement of the cyst was performed, and the patient quickly recovered his range of motion. Histological analysis confirmed a synovial cyst in accordance with arthroscopic and radiological findings. Conclusion: This case is interesting because of the rare occurrence of ganglion cysts in children.

Intra-Articular Ganglion Cysts of the Knee

“…Thus, congenital synovial displacement may be a cause, especially in pediatric cases 5 . Intra-articular ganglion cysts are rare in pediatric patients and have been described in a limited number of case reports [5][6][7][8] ; therefore, this reduced prevalence may be due to a different pathogenesis in children 5 .…”