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Screw fixation for atlantoaxial dislocation related to Down syndrome in children younger than 5 years

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The aim of this study was to present cases of upper cervical fixation in Down syndrome patients younger than 5 years. In two cases, C1 lateral mass screws were installed. However, owing to the irreducible atlantoaxial dislocation, the screw backed out and fractured. Therefore, O–C2 fusion was performed. Furthermore, C2 bilateral lamina screws were added to the C2 pedicle screw for reinforcement. C1–C2 fusion is an option for Down syndrome patients younger than 5 years with atlantoaxial dislocation, when the dislocation is reducible. If the dislocation is irreducible, or the implant cannot be firmly secured, the fixation range should be expanded to O–C2 or below.
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Keywords: 5 years old; C2 multianchor; Down syndrome; atlantoaxial dislocation; occipitocervical; preschool children

Document Type: Research Article

Affiliations: Department of Orthopaedic Surgery, Nagoya University Hospital, Graduate School of Medicine, Nagoya-City, Aichi, Japan

Publication date: January 1, 2017

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