• Ziming Yao, Dong Guo, Xuejun Zhang, Jun Cao, Haonan Liu, and Rongxuan Gao.
• Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, P.R. China.
• Spine. 2022 Aug 1; 47 (15): 107110761071-1076.

Study DesignProposal of a new classification system for pediatric congenital kyphosis.ObjectiveTo propose a new treatment-oriented classification system for pediatric congenital kyphosis based on radiographic findings and evaluates the reliability of this new classification system.Summary Of Background DataThe classification of congenital kyphosis described by Winter is the one most commonly used. However, this classification of congenital kyphosis cannot direct the surgical options and the treatment choices remain controversial.MethodsFor each type of congenital kyphosis, we propose a set of radiological criteria that are suggestive for diagnosis as well as the corresponding surgical options. To evaluate the reliability of this new classification system, 35 patients with congenital kyphosis were reviewed and classified by four attending spine surgeons and five spine fellows.ResultsOur new classification system divides congenital kyphosis into five types. The overall Fleiss kappa coefficient ( κ ) value for the new classification system was 0.755, which indicates significant agreement. The interobserver and intraob-server κ values were 0.755 and 0.828, respectively, and there were no significant differences in the k values between the attending spine surgeons and spine fellows.ConclusionThe proposed classification system provides clear descriptions and surgical options for various types of pediatric congenital kyphotic deformities. The reliability study confirmed that the classification system is both simple and consistent, although further research may be needed to validate the system.Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.

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