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Developmental Dysplasia of the Hip (DDH) is known to cause Excessive Proximal Femoral Torsion (EPFT). EPFT can be treated with a Proximal Femoral Derotation Osteotomy (PFDRO) with good success, which is usually performed via closed versus open osteotomy and intramedullary nailing.
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Voort et al. (2022) studied this question.
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