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A Clinically Relevant Classification System for Pediatric Talocalcaneal Coalition.

Xiong-Tao Li1, Xian-Tao Shen, Xing Wu

  • 1Department of Orthopedics Surgery, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China.

Journal of Pediatric Orthopedics
|September 12, 2025
PubMed
Summary

A new classification for pediatric talocalcaneal coalition (TCC) reliably guides treatment. It correlates TCC types with hindfoot alignment and surgical outcomes, simplifying pediatric TCC management.

Keywords:
childrenclassificationtalocalcaneal coalitionvalgusvarus

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Area of Science:

  • Orthopedics
  • Pediatric Orthopedics
  • Foot and Ankle Surgery

Background:

  • Talocalcaneal coalition (TCC) is a common pediatric foot condition.
  • Existing classifications lack clinical relevance and therapeutic guidance for pediatric TCC.
  • A novel, clinically applicable classification system for pediatric TCC is needed.

Purpose of the Study:

  • To introduce and validate a new classification system for pediatric talocalcaneal coalition (TCC).
  • To assess the clinical relevance, reliability, and ease of use of the proposed TCC classification.
  • To correlate TCC types with hindfoot alignment, treatment strategies, and surgical outcomes.

Main Methods:

  • A retrospective review of 43 patients (58 feet) with pediatric TCC diagnosed via 3D CT scans.
  • Classification of TCC into Type I (middle facet), Type II (posterior facet), and Type III (extra-articular).
  • Independent classification by three pediatric orthopaedic surgeons to determine interobserver agreement and documentation of clinical parameters.

Main Results:

  • The novel classification demonstrated high interobserver agreement (kappa=0.90).
  • Type I TCC correlated with hindfoot valgus, Type II with hindfoot varus.
  • Types II and III TCC more frequently required lateral displacement osteotomy; Type III had the shortest operative time and no complications.

Conclusions:

  • A novel, reliable, and user-friendly classification system for pediatric TCC is proposed.
  • The classification effectively correlates TCC types with hindfoot alignment and guides surgical intervention.
  • Type III TCC is associated with favorable surgical outcomes, including shorter operative times and fewer complications.