Fig. 1 A–E.

The drawings show a pediatric hip, identifying the three Herring pillars and the height of each Herring class hip. (A) The three pillars in the Herring lateral pillar classification are: L = lateral pillar; C = central pillar; and M = medial pillar. (B) In Herring Group A, 100% of lateral pillar height is maintained. (C) In Herring Group B, greater than 50% of the lateral pillar height is maintained. (D) In this example of Herring Group B/C border, the tall and narrow type is shown with slightly more than 50% of the lateral pillar height maintained on a narrow base. (E) In Herring Group C, less than 50% of the lateral pillar height is maintained.