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A 14-year-old male patient with a preoperative (A) normal femoral head-neck junction (arrow), at 11 years (B) after prophylactic pinning of the asymptomatic right side and the lateral view (C) at 11-year followup are shown. (B) The AP radiograph and (C) the lateral view (C) at followup show a large cam morphology resembling a pistol grip deformity (arrows).
