Bilateral os peroneum

Case contributed by Mohammad Taghi Niknejad
Diagnosis certain

Presentation

Recent trauma.

Patient Data

Age: 50 years
Gender: Female
x-ray

A small accessory bone located at the lateral plantar aspect of the cuboid bilaterally, in relation to Os peroneum.

Case Discussion

There is an incidental finding in this trauma work up foot x-rays. A small accessory bone located just proximal to the base of the bilateral 5th metatarsal within the substance of peroneus longus tendon as it arches around the cuboid consistent with os peroneum.
It may cause os peroneum syndrome including fracture, peroneus longus tenosynovitis and peroneus longus tendon tear.

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