Recurrent cyclops lesion after primary anterior cruciate ligament reconstruction using bone tendon bone allograft: A case report

Figure 1  Sagittal T2-weighted fast spin echo sequence magnetic resonance imaging (3 tesla magnet) revealed complete tear of the right anterior cruciate ligament (orange arrow).

Figure 2 Postoperative X-ray indicating the correct position of the femoral and tibial tunnels. A: Anteroposterior; B: Lateral.

Figure 3 Postoperative magnetic resonance imaging right knee. A: Magnetic resonance imaging films (3 tesla magnet) in sagittal proton-density fast spin echo with fat saturation (PD FSE FSAT) sequence (orange arrow); B: Coronal T2-weighted FSE FSAT sequence (orange arrow); C: Axial PD FSE FSAT sequence views taken after anterior cruciate ligament reconstruction with cyclops lesion measuring 16 mm × 17 mm × 11 mm (orange arrow).

Figure 4 Images taken during arthroscopic limited debridement of the right knee. A: Cyclops lesion at the proximal insertion of the anterior cruciate ligament; B: The intercondylar notch following removal of the lesion.

Figure 5 Postoperative magnetic resonance imaging right knee. A: Magnetic resonance imaging films (3 tesla magnet) in sagittal proton-density fast spin echo with fat saturation (PD FSE FSAT) sequence (orange arrow); B: Coronal T2-weighted FSE FSAT sequence (orange arrow); C: Axial PD FSAT sequence views demonstrated a recurrent cyclops lesion of right anterior cruciate ligament graft with an estimated size of 5 mm × 9 mm × 10 mm (orange arrow).

Figure 6 Images captured during repeat arthroscopy of the right knee. A: Recurrent cyclops lesion; B: The intercondylar notch following debridement.