Os Subtibiale
Description
Name
- Os Subtibiale
- Accessory tibial bone
- Os tibiale externum
General
- Rare accessory ossicle and normal variant
- Found at the posterior colliculus of the medial malleolus[3]
- Seen in approximately 1% of the general population
- One of the accessory bones of the foot and ankle
Clinical Presentation
- Usually asymptomatic/ incidental finding
- Can become painful or symptomatic
Radiographic Features
- Well corticated and seen posteriorly to the medial malleolus[4]
- Approximately 4 mm in size
Clinical Significance
Differential Diagnosis
- Medial Malleolus Fracture
- Unfused medial malleolus ossification center
- Deltoid Ligament Complex calcification, post traumatic
See Also
References
- ↑ Madhuri, V., P. M. Poonnoose, and W. Lurstep. "Accessory os subtibiale: a case report of misdiagnosed fracture." Foot Ankle Online J 2.3 (2009).
- ↑ Candan, Busra, Ebru Torun, and Rumeysa Dikici. "The prevalence of accessory ossicles, sesamoid bones, and biphalangism of the foot and ankle: a radiographic study." Foot & Ankle Orthopaedics 7.1 (2022): 24730114211068792.
- ↑ Coral A. The radiology of skeletal elements in the subtibial region: incidence and significance. Skeletal Radiol. 1987;16 (4): 298-303.
- ↑ Calder JDF. Sporting Injuries to the Foot & Ankle, An Issue of Foot and Ankle Clinics, (The Clinics: Orthopedics). Elsevier