From the Research
Cyclops lesion symptoms typically include knee pain, limited range of motion, and a mechanical block to full knee extension following anterior cruciate ligament (ACL) reconstruction surgery, and treatment usually requires arthroscopic removal of the lesion to restore full knee extension, followed by physical therapy to regain motion and strength. Patients often experience a painful "clunk" when trying to fully extend the knee, along with swelling, stiffness, and difficulty walking normally. The pain is usually located at the front of the knee and worsens with activity. This condition occurs when fibrous scar tissue forms in the intercondylar notch of the knee, creating a nodular mass that physically blocks complete extension. The name "cyclops" comes from the appearance of this nodular lesion, which resembles a single eye. Symptoms typically develop within the first few months after ACL reconstruction as the scar tissue forms and enlarges.
Some key points to consider when diagnosing and treating cyclops lesions include:
- The importance of early recognition of symptoms to prevent prolonged disability and ensure successful recovery from ACL reconstruction 1
- The use of magnetic resonance imaging (MRI) to diagnose cyclops lesions 2
- The effectiveness of arthroscopic debridement in treating cyclops syndrome, which is a cyclops lesion that causes a loss of terminal extension 1
- The need for physical therapy to regain motion and strength after arthroscopic removal of the lesion 3
In terms of treatment, arthroscopic removal of the lesion is the most effective way to restore full knee extension, followed by physical therapy to regain motion and strength. This approach has been shown to be effective in improving knee function and reducing pain and stiffness 3, 2. It is also important to note that early recognition and treatment of cyclops lesions can help prevent prolonged disability and ensure successful recovery from ACL reconstruction.
Overall, cyclops lesions are a significant complication of ACL reconstruction surgery, and early recognition and treatment are critical to preventing prolonged disability and ensuring successful recovery. The most effective treatment for cyclops lesions is arthroscopic removal of the lesion, followed by physical therapy to regain motion and strength 1, 2.