| Congenital hypoplasia of the arch of the atlas with abnormal segmentation of the cervical spine. | |
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MedLine Citation:
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PMID: 8186045 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We describe a 53-year-old Japanese woman with absence of the posterior arch of the atlas. Computed tomography revealed that the residual posterior fragment which was displaced to the right side does not correspond to a rare ossification center in the midline and that there was no clear mass of the posterior arch except for a small fragment. Moreover, the midline center was not demonstrated as a soft tissue mass. Easy tilting of the posterior fragment on flexion-extension movement suggests that the cartilaginous arch was not present between the lateral masses and the posterior fragment of the atlas. These observations support the hypothesis that hypoplastic development of the arch plays a major role in the pathogenesis of this anomaly rather than incomplete ossification. Abnormal segmentation of the vertebrae may be implicated in the etiology of this condition, since fusion of the anterior vertebral masses between the C5-6 levels, as shown in Klippel-Feil syndrome, is also observed. |
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Authors:
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M Chigira; K Kaneko; K Mashio; H Watanabe |
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Publication Detail:
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Type: Case Reports; Journal Article |
Journal Detail:
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Title: Archives of orthopaedic and trauma surgery Volume: 113 ISSN: 0936-8051 ISO Abbreviation: Arch Orthop Trauma Surg Publication Date: 1994 |
Date Detail:
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Created Date: 1994-06-21 Completed Date: 1994-06-21 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9011043 Medline TA: Arch Orthop Trauma Surg Country: GERMANY |
Other Details:
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Languages: eng Pagination: 110-2 Citation Subset: IM |
Affiliation:
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Department of Orthopedic Surgery, Gunma University School of Medicine, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cervical Atlas
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abnormalities*,
radiography Cervical Vertebrae / abnormalities*, radiography Female Humans Middle Aged Tomography, X-Ray Computed |
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