Os calcaneus secundarius

Case contributed by Dr Andrew Dixon

Presentation

Hindfoot pain.

Patient Data

Age: 14
Gender: Female
CT

Os calcaneus secundarius (an accessory ossicle) is demonstrated with a pseudo-arthrosis between it and the anterior process of the calcaneus. The calcaneus secundarius articulates with the navicular.

This anatomical variant may be the source of the patient's symptoms.  The other foot is shown for comparison.

Case Discussion

An os calcaneus secundarius is an accessory ossicle of the anterior calcaneal process present in up to 5% of the population at cadaveric examination.

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Case information

rID: 10660
Published: 2nd Sep 2010
Last edited: 13th Aug 2019
Inclusion in quiz mode: Included

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