Tarsal coalition - calcaneonavicular

Case contributed by Assoc Prof Frank Gaillard


Complaining of flat feet and right midfoot pain, worse on walking.

Patient Data

Age: Adolescent
Gender: Female

Calcaneonavicular coalition.

Case Discussion

Tarsal coalition occurs in approximately 1%. It typically presents in adolescence. 50% are bilateral (even if symptomatic on only one side). Frequently pes planus (flat foot) is a feature. Coalition may be bony, fibrous (this case) or cartilaginous.

The commonest coalition is calcaneonavicular. This is best seen on an oblique projection.

In a bony coalition, a ‘bony bar’ is observed. In a fibrous coalition, irregularity and narrowing of the bony interfaces with sclerosis is identified (this case). If further imaging is required, CT is the investigation of choice.

Case courtesy of: Dr Ian Bickle

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Case information

rID: 7608
Published: 12th Nov 2009
Last edited: 21st Mar 2020
Tag: foot, feet
Inclusion in quiz mode: Included

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