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Acetabuloplasty. A female patient was diagnosed with DDH of the left hip at the age of 6 mo using sonography. She was treated with a spica cast. AVN of the left femoral head was seen on follow-up radiographs at the age of 3 years (A,B); C, D: Acetabuloplasty of the left hip with femoral derotational osteotomy was performed at the age of 5 years; E, F: Follow-up X-rays at the age of 8 years. DDH: Developmental dysplasia of the hip; AVN: Avascular necrosis.
