Accessory navicular bone

Case contributed by Dr Mohammad A. ElBeialy


Medial foot pain

Patient Data

Age: 30 years
Gender: Male
Type II accessory navicular bone with cortical irregularity and subchondral degenerative marrow edema signal along the bony synchondrosis at the medial posterior aspect of the navicular bone. Intact tibialis posterior tendon.
Type II accessory navicular bone with mild subchondral sclerosis and cortical irregularity in a different patient with medial navicular pain. 

Case Discussion

An os tibiale externum (or accessory navicular / os naviculare) is a large ossicleadjacent to the medial side of the navicular bone. Most cases are asymptomatic but  it may cause a painful tendinosis.

PlayAdd to Share

Case information

rID: 24052
Published: 26th Jul 2013
Last edited: 14th Aug 2019
Tag: foot
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.