Fig. 2A–D.

A 9.5-year-old boy with Perthes’ disease, who had been operated at the age of eight with varus osteotomy of the proximal femoral bone. Eighteen months later, Chiari osteotomy and bone graft augmentation was performed for coxa magna and extruded femoral head (A–C); the nine-year follow-up radiograph showed complete resorption of the bone graft and uncoverage of the femoral head (D)