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Examination of Morphometric Features of Accessory Bones in the Foot Using Computed Tomography
Tugce Ugur Kasar1, Zeliha Fazliogullari1, Mehmet Sedat Durmaz2
1Department of Anatomy, Faculty of Medicine, Selcuk University, Konya, Turkey.
Anatomia, Histologia, Embryologia
|June 24, 2026
Summary
Accessory bones in the foot are common developmental anomalies, with incidence increasing in older individuals. Understanding their morphometric characteristics aids in diagnosing foot pathologies.
Area of Science:
- Orthopedics
- Radiology
- Anatomy
Background:
- Accessory bones are unfused ossification centers with no defined function.
- They can cause complications like infection, dislocation, and misdiagnosis with fractures.
Purpose of the Study:
- To determine the morphometric characteristics and frequency of accessory bones in the foot.
- To analyze the incidence of accessory bones across different age groups.
Main Methods:
- Retrospective review of 400 foot computed tomography (CT) scans.
- Measurement of accessory bone surface area, long, and short diameters.
Main Results:
- 67.5% of individuals had at least one accessory bone.
- Incidence increased from 57.6% in younger to 81.4% in older individuals.
- Accessory navicular bone (41.5%), os trigonum (14%), and os peroneum (13%) were most common.
Conclusions:
- Accessory bones are highly prevalent and their occurrence increases with age.
- Morphometric data and identification of novel accessory bones can aid clinical diagnosis.
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