Os subfibulare

Case contributed by Servet Kahveci
Diagnosis certain

Presentation

Incidental finding on ankle CT in a patient with recent trauma.

Patient Data

Age: 40 years
Gender: Male
ct

CT reveals a large ossicle (os subfibulare) to the tip of the lateral malleolus with pseudoarthrosis of the fragment.

Annotated image

CT reveals an os subfibulare (white arrow) to the tip of the lateral malleolus with pseudoarthrosis (yellow arrow) of the fragment.

Case Discussion

Knowledge of accessory ossicles may prevent misdiagnosis and unnecessary further tests. 

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