2014
DOI: 10.4055/cios.2014.6.1.96
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Congenital Anomaly of the Atlas Misdiagnosed as Posterior Arch Fracture of the Atlas and Atlantoaxial Subluxation

Abstract: Case ReportClinics in Orthopedic Surgery 2014;6:96-100 • http://dx

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Cited by 16 publications
(15 citation statements)
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“…In rare cases, the right and left laminae fail to fuse, leaving the posterior tubercle of the atlas isolated, a condition known as posterior arch agenesis. 1,5,7 A secondary ossification center usually appears for the posterior tubercle. 1,7 The atlas also may be subject to numerous variations, such as its occipital assimilation, duplication, anterior arch agenesis, or even a bipartite atlas.…”
Section: Discussionmentioning
confidence: 99%
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“…In rare cases, the right and left laminae fail to fuse, leaving the posterior tubercle of the atlas isolated, a condition known as posterior arch agenesis. 1,5,7 A secondary ossification center usually appears for the posterior tubercle. 1,7 The atlas also may be subject to numerous variations, such as its occipital assimilation, duplication, anterior arch agenesis, or even a bipartite atlas.…”
Section: Discussionmentioning
confidence: 99%
“…1,7 The atlas also may be subject to numerous variations, such as its occipital assimilation, duplication, anterior arch agenesis, or even a bipartite atlas. 2,5 There are five distinct types of posterior arch agenesis, classified according to the form of fusion (A, B, C, D and E). The case presented herein is classified as Type D, described as "Absence of the posterior arch with persistent posterior tubercle".…”
Section: Discussionmentioning
confidence: 99%
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“…Currarino et al proposed a classification of defect of posterior arch of atlas [6]. Occult spina bifida of atlas may be misdiagnosed as a fracture [27]. Spina bifida aperta of atlas is a severe type [28].…”
Section: Developmental Embryology and Molecular Regulations Of Spina mentioning
confidence: 99%