Slipped capital femoral epiphysis (SCFE) is an adolescent hip disorder defined as a posterior and inferior slip of the proximal femoral epiphysis relative to the metaphysis. However, the relationship of the epiphysis and its articular surface relative to the acetabulum is not altered, and the movement is better defined as an anterior and superior slip of the proximal femoral metaphysis (neck) relative to the epiphysis. The technique of internal fixation is much easier to comprehend when this is understood.