Os subtibiale

Case contributed by Ammar Ashraf
Diagnosis almost certain


Left ankle pain. History of ankle twisting one day ago.

Patient Data

Age: 8 years
Gender: Female

No bone fracture or dislocation is seen. A small well-corticated bone fragment is noted adjacent to the medial malleolus which is likely an os subtibiale.

Case Discussion

Os subtibiale is an uncommon accessory ossicle, discovered as an incidental finding and should not be confused with a fracture in the trauma setting.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

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

 Thank you for updating your details.