Os vesalianum (foot)

An os vesalianum is an accessory ossicle of the foot. Although asymptomatic, it may become symptomatic occasionally, causing lateral foot pain and requiring surgical excision .

Gross anatomy

It is formed as a result of failed fusion of the secondary ossification center of the metatarsal. It is situated at the base of the fifth metatarsal in the peroneus brevis tendon .

Differential diagnosis

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