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Accessory navicular bone

Case contributed by Dr Jack Ren


Medial foot pain


There is an accessory  bone located on patient's posteromedial tuberosity of the tarsal navicular bone. The accessory bone has a cartilaginous connection to the navicular best seen on T2 sequence which suggests it is a type II accessory navicular bone.

Case Discussion

Accessory navicular bones are also known as os tibiale externum or os naviculare and are considered a normal anatomical variant; although it can cause a painful tendinosis. 

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Case information

rID: 23772
Published: 7th Jul 2013
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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