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Incidence and variants of posterior arch defects of the atlas vertebra


Guenkel, Sebastian; Schlaepfer, Sladjana; Gordic, Sonja; Wanner, Guido A; Simmen, Hans-Peter; Werner, Clément M L (2013). Incidence and variants of posterior arch defects of the atlas vertebra. Radiology Research and Practice, 2013:957280.

Abstract

In order to describe the incidence and existing variants of congenital anomalies of the atlas vertebrae in a Caucasian population, we examined 1069 CT scans of the upper cervical spine. We found 41 cases with altered atlas vertebrae, representing 3.8% of all analyzed patients. With 83% of all found anomalies, the predominant type is characterized by a small dorsal cleft (3.2% of all patients). Rare varieties feature unilateral or bilateral dorsal arch defects, combined anterior and posterior clefts (0.2% of all patients) or total erratic atlas vertebra malformation (0.1% of all patients). Atlas arch defects are found nearly 4% at the time. Most anomalies affect the posterior arch, whereas the anterior arch or both are rarely affected. Totally irregular C1 vertebrae are extremely infrequent.

Abstract

In order to describe the incidence and existing variants of congenital anomalies of the atlas vertebrae in a Caucasian population, we examined 1069 CT scans of the upper cervical spine. We found 41 cases with altered atlas vertebrae, representing 3.8% of all analyzed patients. With 83% of all found anomalies, the predominant type is characterized by a small dorsal cleft (3.2% of all patients). Rare varieties feature unilateral or bilateral dorsal arch defects, combined anterior and posterior clefts (0.2% of all patients) or total erratic atlas vertebra malformation (0.1% of all patients). Atlas arch defects are found nearly 4% at the time. Most anomalies affect the posterior arch, whereas the anterior arch or both are rarely affected. Totally irregular C1 vertebrae are extremely infrequent.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Trauma Surgery
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:10 September 2013
Deposited On:12 Dec 2013 14:09
Last Modified:14 Sep 2017 14:12
Publisher:Hindawi Publishing Corporation
ISSN:2090-195X
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.1155/2013/957280
PubMed ID:24109510

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