Document Detail

Ossification patterns of the atlas vertebra.
MedLine Citation:
PMID:  22021519     Owner:  NLM     Status:  In-Data-Review    
OBJECTIVE: The objective of this study was to characterize ossification patterns of the C1 (atlas) vertebra in children, to better differentiate normal variants from traumatic injury.
MATERIALS AND METHODS: A retrospective review of all sinus and temporal bone CT examinations was performed for the period of 2002-2009. Patients 96 months old or younger for whom C1 level was at least partially imaged were included. Patients with a history of trauma or genetic disorder-associated spinal abnormalities were excluded.
RESULTS: A total of 1270 CT examinations were reviewed. The anterior arch of C1 was completely imaged in 841 patients (66%), and the posterior arch was completely imaged in 378 patients (30%). Multiple anterior arch ossification centers were observed in 179 of 841 patients (21%), and posterior arch variants were present in nine of 378 patients (2%). At least partial ossification of the anterior arch was seen in 113 of 147 children (77%) younger than 25 months, whereas only 14 of the remaining 694 children (2%) older than 24 months failed to show any ossification. Incomplete ossification of the anterior arch was noted in 47 of 103 patients (46%) in the 85-96-month-old category. The posterior arches were at least partially ossified in all children. Incomplete fusion of the posterior synchondrosis was seen in 17 of 108 patients (16%) older than 60 months.
CONCLUSION: C1 ossification patterns and timing of synchondrosis fusion are variable. Knowledge of these patterns is important to better differentiate a normal variant from traumatic injury.
Joseph J Junewick; Matthew S Chin; Indu Rekha Meesa; Saima Ghori; S Jemar Boynton; Charles R Luttenton
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  AJR. American journal of roentgenology     Volume:  197     ISSN:  1546-3141     ISO Abbreviation:  AJR Am J Roentgenol     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-10-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7708173     Medline TA:  AJR Am J Roentgenol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1229-34     Citation Subset:  AIM; IM    
Department of Radiology, Helen DeVos Children's Hospital/Spectrum Health, Grand Rapids, MI.
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