Valgus slipped capital femoral epiphysis.

Abnormally high stresses involving the capital femoral physis were found in a series of valgus slipped capital femoral epiphysis cases. Using a single leg stance model we studied 10 hips in seven patients in which the epiphysis was lateral and posterior in relation to the femoral neck and calculated that shear stresses were high enough to be associated with failure of the physis. Valgus neck shaft angles and lateral tilt of the physes were seen in all cases.