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(A) A 14-year-old male patient underwent prophylactic pinning on the asymptomatic right side. The alpha angle was normal. (B) At 8-year followup, he presented with a symptomatic cam-type morphology (arrow) with an alpha angle of 62° on the lateral view and underwent surgical hip dislocation (C) for open cam resection (arrow). (D) At 10-year followup, he presented with a good clinical and radiographic outcome with an improved femoral head-neck junction (arrow) and normal alpha angle.
