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Classification and Nomenclature: Progressive Collapsing Foot Deformity.

Mark S Myerson1, David B Thordarson2, Jeffrey E Johnson3

  • 1Department of Orthopedic Surgery, University of Colorado School of Medicine, 12631 East 17th Avenue, B202, Aurora, CO 80045, USA.

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Summary
This summary is machine-generated.

The study proposes renaming adult acquired flatfoot deformity to Progressive Collapsing Foot Deformity (PCFD). A new, validated classification system is introduced to standardize reporting and treatment for this complex condition.

Keywords:
AAFDPCFDadult acquired flatfoot deformityclassification flatfootflatfootprogressive collapsing foot deformityrupture posterior tibial tendon (PTT)

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Area of Science:

  • Orthopedics
  • Podiatry
  • Foot and Ankle Surgery

Background:

  • Historical nomenclature for adult acquired flatfoot deformity (AAFD) is inconsistent, including terms like posterior tibial tendon dysfunction (PTTD) and peritalar subluxation (PTS).
  • Existing classification systems for AAFD lack validation and do not fully capture the complex, three-dimensional nature of the deformity.

Purpose of the Study:

  • To propose a standardized nomenclature and a validated classification system for adult acquired flatfoot deformity.
  • To improve the accuracy and consistency of reporting and treatment planning for this condition.

Main Methods:

  • A consensus group reviewed existing literature and nomenclature for adult acquired flatfoot deformity.
  • Expert opinions were gathered through delegate voting on proposed changes and classification criteria.
  • Consideration was given to incorporating advanced imaging findings, such as Weightbearing CT (WBCT).

Main Results:

  • Unanimous consensus was reached to rename the condition Progressive Collapsing Foot Deformity (PCFD).
  • There was unanimous agreement that current classification systems are incomplete or outdated.
  • A strong consensus supported the proposal and use of a new classification system for clinical staging and treatment definition.

Conclusions:

  • The adoption of the term Progressive Collapsing Foot Deformity (PCFD) and a new classification system is recommended.
  • This initiative aims to standardize data reporting and enhance clinical understanding of this complex foot deformity.
  • The proposed system is designed to better incorporate recent data and provide a more comprehensive approach to diagnosis and management.