Bilateral nonunited femoral neck fracture in a child with osteopetrosis.

We report a case of osteopetrosis with bilateral nonunited femoral neck and coxa vara in a 7-year-old boy. There was a history of traumatic transcervical left femoral neck fracture unsuccessfully treated by internal fixation. We performed a bilateral subtrochanteric valgus osteotomy. K-Wire fixation failed on the right side due to hardness of the bone. Finally, internal fixation with an angular plate after predrilling of the femoral neck offered stability. Bone union was achieved on both sides, resulting in full recovery of normal physical activity.