Os tibiale externum

Case contributed by Dr Laughlin Dawes

Os tibiale externum noted. 

Case Discussion

Os tibiale externum (accessory navicular) is a large ossicle adjacent to the medial side of the navicular bone. The tibialis posterior tendon often inserts with a broad attachment onto the ossicle, which may cause a painful tendinosis due traction between the ossicle and the navicular. Such changes are best seen on MRI.

Credit: Dr Donna D'Souza.

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Case information

rID: 35919
Published: 10th May 2015
Last edited: 6th Nov 2015
Tag: foot
Inclusion in quiz mode: Included

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