The Journal of Bone and Joint Surgery, Vol 68, Issue 6 920-922, Copyright © 1986 by Journal of Bone and Joint Surgery, Inc
The metaphyseal blanch sign of slipped capital femoral epiphysis
HH Steel
In the early stage of slipping of the capital femoral epiphysis, the
epiphysis slips posteriorly in relation to the neck of the femur. When this
occurs, the posterior portion of the femoral head is seen on the
anteroposterior radiograph as a crescent-shaped area of increased density
overlying the metaphysis adjacent to the epiphyseal plate. This metaphyseal
blanch sign suggests that slipping of the capital femoral epiphysis has
occurred and that a lateral radiograph should be made to confirm or exclude
the diagnosis.