Vitamin D–resistant rickets. A, Child before treatment has deformities in distal femurs. Tibias are not shown in this film. B, Three months after valgus osteotomies of distal femurs and tibias using pins incorporated in plaster above and below osteotomy sites. C, Two years after osteotomies vitamin D–resistant rickets is well controlled with large doses of vitamin D, calcium, and phosphorus. No deformities have recurred.