Os Calcaneus Secundarium

Description

Os calcaneus secundarius (an accessory ossicle) is demonstrated with a pseudo-arthrosis between it and the anterior process of the calcaneus. The calcaneus secundarius articulates with the navicular.

Accessory bones: Os Intermetatarseum, Os Supranaviculare, Os Naviculare, Os Supratalare, Os Vesalianum, Os Peroneum, Os Calcaneus Secundarium, Os Trigonum

Name

• Os Calcaneus Secundarium
• Os Calcaneus Secundarius

General

• Accessory ossicle of the anterior calcaneal process
• One of the accessory bones of the foot and ankle

Epidemiology

• Present in up to 5% of the population based on cadaveric studies (need citation)

Pathology

• Can cause ankle pain
• May mimic bifurcate ligament avulsion fracture

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Clinical Significance

• Needs to be updated

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See Also

• Foot Anatomy Main
• Physical Exam Foot
• Foot Pain Main

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