Journal List > J Korean Orthop Assoc > v.45(3) > 1012996

Whang, Chung, Suh, Kang, Kim, Kim, and Cho: Inferior Accessory Ossicle of the Anterior Arch of the Atlas

Abstract

An inferior accessory ossicle of the anterior arch of the atlas is quite rare and should not be confused with other pathological conditions such as a fracture. Here we report a case of an inferior accessory ossicle of the anterior arch of the atlas in a 29-year-old male and a review of literature.

Figures and Tables

Figure 1
Lateral cervical radiograph shows loss of cervical lordotic curvature and bone fragment inferior to the anterior arch of the atlas. There is no prevertebral soft tissue swelling.
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Figure 2
Magnified image of the upper cervical spine shows a well corticated inferior accessory ossicle of the anterior arch of the atlas (arrow).
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Figure 3
Sagittal CT image shows marginal sclerotic elliptical ossicle inferior to the anterior arch of the atlas.
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Figure 4
Axial CT image shows the midline location of the inferior accessory ossicle of the anterior arch of the atlas.
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Figure 5
3D CT image viewed from anterior aspect of the upper cervical spine shows the inferior accessory ossicle of the anterior arch of the atlas.
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Figure 6
(A) Flexion and (B) extension lateral cervical radiographs show no motion of the inferior accessory ossicle of the anterior arch of the atlas.
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References

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