Stieda process

Case contributed by Dr Daniel J Bell


Ankle pain

Patient Data

Age: 50 years
Gender: Female

Elongated posterior process of the talus representing a Stieda process. No acute bony injury. No other findings of note. The AP ankle radiograph was unremarkable.

Case Discussion

The secondary posterolateral talus ossification center normally forms between 8-13 years old and generally fuses with the body of the talus within a year. If fusion does not occur then an os trigonum results, alternatively fusion occurs but the resultant structure is prominent, producing a Stieda process.

A Stieda process per se is not pathological, however its presence increases the risk of the posterior ankle impingement syndrome. 

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Case information

rID: 59648
Published: 19th Apr 2018
Last edited: 29th Dec 2019
Inclusion in quiz mode: Included
Institution: North Middlesex University Hospital

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