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Localized anterior arthrofibrosis (cyclops lesion) is having around 1-9.8% frequency rate after anterior cruciate ligament (ACL) reconstruction. It has been reported to be a significant cause of loss of knee extension after reconstruction of the ACL of the knee. We present a case report of a patient with prior ACL reconstruction who presented with pain and loss of extension following surgery. MR imaging revealed the typical features of cyclops lesion. Repeat arthroscopy excision of the lesion is the only treatment to reduce the morbidity of the patient.