Prophylactic Intramedullary Rodding After Femoral Lengthening in Patients With Achondroplasia and Hypochondroplasia.

Background: Femoral fracture after femoral lengthening in patients with achondroplasia and hypochondroplasia is a frequent complication, occurring in up to 30%. The purpose of this study is to demonstrate the effectiveness of prophylactic intramedullary rodding in preventing this complication.

Methods: Multicenter retrospective study involving 86 femoral lengthening procedures in 43 patients with achondroplasia or hypochondroplasia.

Orthopaedic disorders of pycnodysostosis: a report of five clinical cases.

Purpose: Pycnodysostosis is a rare autosomal recessive genetic disorder usually diagnosed at an early age. The few previously published case series have generally focused on maxillofacial manifestations and genetic considerations. The purpose of this study was to evaluate the clinical characteristics and differential diagnosis of pycnodysostosis focusing on its orthopaedic manifestations, which have been poorly described in the literature.