Accessory bones of the foot - os tibiale externum and os peroneum

Case contributed by Leonardo Lustosa

Presentation

Motor vehicle accident. Tenderness on the right foot.

Patient Data

Age: 35 years
Gender: Male

Normal foot radiographs.

Incidental os tibiale externum and os peroneum are noted (see annotated images below).

Accessory bones

Annotated image

Accessory ossicles are highlighted:

  • os tibiale externum - blue
  • os peroneum - green

Case Discussion

Accessory ossicles of the foot are common anatomical variants.

In the present case, both the os tibiale externum and os peroneum were incidentally noted.

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