Total hip arthroplasty in an adult with proximal femoral focal deficiency

A 40-year-old woman with isolated unilateral proximal femoral focal deficiency presented with 2 years of gradually increasing left hip pain that interfered with her activities of daily living. A total hip arthroplasty was performed through a posterior approach. At 12 months, she had minimal discomfort about the hip, a markedly increased level of activity, and improved gait, and she required no ambulatory aids. This procedure is cautiously recommended for use in selected patients with proximal femoral focal deficiency.