Slipped capital femoral epiphysis

Plain anteroposterior/frog-leg lateral radiographs: Klein line drawn along the superior cortex does not intersect the femoral head.[Figure caption and citation for the preceding image starts]: Klein lines are drawn along the superior cortex of the femoral neck. A normal Klein line will intersect the epiphysis. An abnormal Klein line does not intersect the epiphysis, as the femoral neck has moved proximally and anteriorly relative to the epiphysisImage courtesy of John M. Flynn, MD [Citation ends].