Daniel W Green, Ngozi Mogekwu, David M Scher, Sheryl Handler, Peter Chalmers, Roger F Widmann
BACKGROUND: Radiographs can diagnose slipped capital femoral epiphysis (SCFE) on the anterior-posterior (AP) pelvis view and the frog-leg lateral view of the hips. On the AP radiograph, the lack of intersection between a line drawn parallel to the superior edge of the femoral neck (Klein's Line) and the epiphysis confirms a slip. Despite broad knowledge of the Klein's Line principle, application is difficult and inaccurate, especially in mild cases. On the frog-leg lateral radiograph, Southwick head/shaft angle and Wilson percent epiphyseal displacement commonly quantify the slip...
July 2009: Journal of Pediatric Orthopedics