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Multiplanar Interactions in the Cavovarus Foot.

Andrew Behrens1, Nolan Schonhorst1,2, Lauren Crowe1

  • 1Department of Orthopedics & Rehabilitation, The University of Iowa, Iowa City, IA, USA.

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PubMed
Summary
This summary is machine-generated.

Charcot-Marie-Tooth (CMT) disease causes neurogenic cavus foot with more severe forefoot adduction and midfoot supination than idiopathic cases. This exaggerated arch curvature contributes to foot stiffness in CMT patients.

Keywords:
Charcot-Marie-Toothcavovaruscomputed tomography

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Area of Science:

  • Orthopedics
  • Neurology
  • Radiology

Background:

  • Charcot-Marie-Tooth (CMT) disease is a leading cause of neurogenic cavus foot.
  • Understanding the distinct foot morphology in CMT is crucial for diagnosis and treatment.

Purpose of the Study:

  • To differentiate the morphologic characteristics of pes cavus in individuals with CMT, idiopathic cavus, and healthy controls.
  • To quantify differences in arch height and foot alignment between these groups.

Main Methods:

  • A case-control study involving 73 participants (18-65 years) with confirmed CMT, idiopathic cavus, or no foot conditions.
  • Weightbearing computed tomography (WBCT) was used for morphologic assessment of foot structures.
  • Statistical analysis included generalized linear models and Wilcoxon rank sum tests.

Main Results:

  • 120 WBCT scans were analyzed, comparing medial longitudinal arch height, forefoot adduction/midfoot supination, and transverse tarsal arch angles.
  • Individuals with CMT exhibited significantly greater medial longitudinal arch height compared to controls (P < .05).
  • Forefoot adduction was three times greater in CMT, and the transverse arch plantar (TAP) angle was significantly more curved in CMT (94.2°) than in idiopathic (100.5°) or control (102.7°) groups.

Conclusions:

  • Forefoot adduction and midfoot supination are more pronounced in CMT-associated pes cavus, indicating greater muscular imbalance.
  • The medial longitudinal and transverse arches are more severely affected in CMT patients.
  • The exaggerated transverse tarsal arch curvature in CMT may lead to increased foot stiffness.