Hindfoot alignment using weight-bearing computed tomography

a new measurement for pes cavovarus

  • Eduardo Araújo Pires Lab. Prof Manlio Mario Marco Napoli, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, SP, Brazil
  • Carlos Felipe Teixeira Lôbo Grupo de Radiologia Musculoesquelética, Instituto de Ortopedia e Traumatologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, SP, Brazil
  • Cesar de Cesar Netto University of Iowa, Carver College of Medicine, Iowa City, Iowa, USA https://orcid.org/0000-0001-6037-0685
  • Alexandre Leme Godoy-Santos Lab. Prof Manlio Mario Marco Napoli, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, SP, Brazil https://orcid.org/0000-0002-6672-1869
Keywords: Talipes Cavus/diagnostic imaging, Weight-Bearing/physiology, Tomography, X-Ray computed/methods, Bone malalignment

Abstract

Measurement of hindfoot malalignment and flexibility is essential for treatment decision-making in cavovarus foot deformity. Weight-bearing computed tomography (WBCT) shows greater diagnostic accuracy and allows the study of osteoarticular alignment in the physiological upright position. The most commonly used method for measurements on WBCT scans is the foot and ankle offset (FAO), which is based on the structural tripod of the foot: the calcaneus and the first and fifth metatarsal heads. During the Coleman block test, the first metatarsal head is not resting on the ground and, therefore, does not represent the physiological support of the tripod. We describe a new measurement, the forefoot/hindfoot offset (FHO), for assessing hindfoot alignment on WBCT scans. Level of Evidence V; Diagnostic Studies; Expert Opinion.

Published
21-12-2020
How to Cite
Pires, E., Lôbo, C., de Cesar Netto, C., & Godoy-Santos, A. (2020). Hindfoot alignment using weight-bearing computed tomography: a new measurement for pes cavovarus. Journal of the Foot & Ankle, 14(3), 239-242. https://doi.org/10.30795/jfootankle.2020.v14.1214