Persistierendes Ossiculum terminale
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Os
odontoideum • Variant anatomy of the odontoid process of C2 - Ganzer Fall bei Radiopaedia
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Persistent
ossiculum terminale • Ossiculum terminale - Ganzer Fall bei Radiopaedia
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Persistent
ossiculum terminale • Persistent ossiculum terminale - Ganzer Fall bei Radiopaedia
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The ossiculum terminale appears as a secondary ossification center of the dens between 3-6 years and normally fuses by 12 years. Failure of fusion results in a persistent ossiculum terminale (also called Bergmann's ossicle or ossiculum terminale of Bergmann) and is considered a normal anatomical variant of the axis.
It lies above the alar ligament and is therefore considered to be stable and it very rarely causes symptoms.
Radiographic features
- small, well-corticated ossicle at the tip of the dens
- usually in the midline
- dens is typically normal in height
Differential diagnosis
- os odontoideum
- type 1 odontoid fracture
Siehe auch:
und weiter:
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