Tarsal Coalition Differential Diagnoses

Updated: Sep 08, 2016
  • Author: Louis P Vu, MD; Chief Editor: Vinod K Panchbhavi, MD, FACS  more...
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Diagnostic Considerations

Differential diagnoses of tarsal coalition include tumor, rheumatologic processes, and fractures about the subtalar joint. A case report even exists of a previously asymptomatic talocalcaneal coalition that presented as a painful fracture of the talar beak. Tarsal coalitions have been shown to present as other foot deformities, including cavovarus deformity and talipes equinovarus.

Syndromes that may present with tarsal coalitions include fibular hemimelia, Nievergelt-Pearlman syndrome, and Apert syndrome. In the cases of associated limb deficiency at birth, tarsal coalition may present in association with ball-and-socket ankle, [28, 29, 30] which has been demonstrated to allow compensatory inversion and eversion.