Contralateral involvement of congenital muscular torticollis and clavicular fracture

ABSTRACT Congenital muscular torticollis (CMT) is known to concur with some conditions such as developmental dysplasia of the hip or brachial plexus injury, which gives us some insights for pathogenesis of CMT. While clavicular fracture is the most common fracture in newborns, little is known about concurrence of CMT and clavicular fracture. Our clinical experience led us to realize that concurrence of CMT and clavicular fracture tended to occur on the contralateral side for each other rather than the ipsilateral side. This study aimed to verify contralateral concurrence of CMT and clavicular fracture. This is a retrospective cohort study in a tertiary hospital, including 996 subjects with CMT. Concurrent clavicular fracture was found in 20 of 996 subjects with CMT, with the concurrence rate being 2.01%. CMT and clavicular fracture occurred on the contralateral side for each other in 18 subjects (90%) rather than the ipsilateral side. This contralateral concurrence between side of CMT and clavicular fracture was significant (P=0.001), with an odds ratio of 81 (P=0.0032). CMT and clavicular fracture seem to occur significantly more on the contralateral side for each other. Underlying mechanism for consistent contralateral concurrence needs to be verified in the near future. Correspondence: All correspondence and requests for reprints should be addressed to: Shin-Young Yim, MD, PhD, The Center for Torticollis, Department of Physical Medicine and Rehabilitation, Ajou University School of Medicine, 164 World cup-ro, Yeongtong-gu, Suwon 16499, Republic of Korea. Tel: +82-31-219-5284, Fax: +82-31-219-5209. E-mail address: syyim@ajou.ac.kr Author Disclosures: No conflicts of interest have been reported by the authors or by any individuals in control of the content of this article. No funding or grants or equipment provided for the project from any source have been reported by the authors. Funding/Support: This work was supported by the grants through the National Research Foundation of Korea (NRF) funded by the Ministry Science, ICT and Future Planning, Republic of Korea (2016R1A2B1010654). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.

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