The os subtibiale is an uncommon accessory ossicle distal and posterior to the medial malleolus that is seen in less than 1% of the population. It is thought to represent an unfused epiphyseal ossification center related to the posterior colliculus of the medial malleolus.
References
- Coral A. The radiology of skeletal elements in the subtibial region: incidence and significance. Skeletal Radiol. 1987;16(4):298-303.
- Coral A. Os subtibiale mistaken for a recent fracture. Br Med J (Clin Res Ed). 1986 Jun 14;292(6535):1571-2.
- Lapidus PW. OS SUBTIBIALE: Inconstant Bone Over the Tip of the Medial Malleolus. J Bone Joint Surg Am. 1933;15:766-771.
The os subtibiale is an uncommon accessory ossicle distal and posterior to the medial malleolus that is seen in less than 1% of the population. It is thought to represent an unfused epiphyseal ossification center related to the posterior colliculus of the medial malleolus.
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