Abstract
Cyclops syndrome can be present after ACL reconstruction in rare cases. We reported a case of Cyclops syndrome described by Jackson, in a 17 year old male patient. The post operative course after arthroscopic ACL reconstruction using a patellar tendon autograft was good without any extension disturbance. Acute knee hemarthrosis happened when the patient kicked a rugby ball at 8 months after operation. Arthroscopy revealed a mass coming out from the tibial side where the ACL graft was implanted in the intercondylar fossa. Arthroscopic excision of the mass resulted in symptoms relief. Pathological examination revealed the presence of synovial tissues with moderate fibrosis, coagulation, necrosis, evidence of old bleeding, and hemosiderosis. To our understanding, these findings were caused by repeated impingements. We thought the Cyclops syndrome was happened when the small Cyclops region grown from the debris was impingede to intercondylar fossa.
