文摘
Introduction The cyclops syndrome or cyclopoid formation, is an arthrofibrotic pathology and described as a secondary complication after reconstruction of the anterior cruciate ligament (ACL). Possible risk factors or reasons are related to the time of surgery after the injury, strong perioperative and postoperative pain conditions or an overly aggressive rehabilitation. In clinical terms, the cyclops syndrome is present as a persistent and painful lack of extension at the knee joint. Case report We report about a 48-year-old sportive, male patient who underwent an arthroscopic reconstructive ACL surgery with hamstring tendons after an injury suffered while playing soccer in September 2010. During the first weeks after surgery, the patient first recognized a lack of extension at the knee joint, further diagnostic investigations were not made by the responsible clinic. At the first examination in this center, we found a painful lack of extension about 10 degrees and recurrent symptoms under workload. Preoperative clinical and radiological examinations and the revision arthroscopy showed an intercondylar cyclops formation, which was arthroscopically resected. Postinterventionally the patient has been free from pain and demonstrated a full range of motion without any lack of extension. Conclusions Ongoing articular pain under workload and painful lack of motion, especially minor extension, should be clinically and radiologically examined after surgical ACL-repair in consideration of time of surgery, peri-/postoperative pain and intensity of rehabilitation. The cyclops syndrome or cyclopoid formation as a secondary scar pathology need to be excluded. If present, they need to be arthroscopically resected.