Series of illustrations depicting a slipped capital femoral epiphysis (SCFE) or slipped upper femoral epiphysis ranging from normal to severe.
The green line on the normal represents the line of Klein drawn on the superior edge of the femoral neck intersecting the lateral aspect of the superior femoral epiphysis.
mild: lateral edge of the epiphysis is within the lateral third of the metaphysis
moderate: lateral edge between the lateral 1/3 and halfway point of the metaphysis
severe: medial third (over the halfway point of the metaphysis)