THA for Hip Ankylosed Before Skeletal Maturity with Complex Femoral Deformity and Subtrochanteric Nonunion: A Case Report.

CASE Total hip arthroplasty (THA) in hips ankylosed and deformed from childhood infection is technically demanding because of distorted anatomy, poor bone quality, and abductor deficiency. A 48-year-old woman with fused hip, subtrochanteric nonunion, and proximal femoral hypoplasia underwent conversion THA through a posterior approach. A dual mobility acetabular cup and long-stem uncemented femoral component were used to reduce the instability risk and achieve fixation. Her postoperative course was uneventful, though rehabilitation was prolonged due to abductor atrophy.

CONCLUSION This case highlights the importance of surgical planning, implant selection, and tailored rehabilitation in complex hip reconstructions.