Partial Aplasia of the Posterior Arch of the Atlas with an Isolated Posterior Arch Remnant: Findings in Three Cases

We report the imaging findings in three symptomatic cases of partial aplasia of the posterior arch of the atlas with an isolated posterior remnant of the arch. These cases are instructive in illustrating the mechanism of cord impingement produced by the posterior arch remnant during extension of the...

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Bibliographic Details
Published in:American journal of neuroradiology : AJNR 2000-06, Vol.21 (6), p.1167-1171
Main Authors: Sharma, Aseem, Gaikwad, Shailesh B, Deol, Parminder S, Mishra, Nalin K, Kale, Shashank S
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Cerebrospinal fluid. Meninges. Spinal cord
Cervical Atlas - abnormalities
Cervical Atlas - diagnostic imaging
Cervical Atlas - surgery
Diseases of the osteoarticular system
Female
Humans
Magnetic Resonance Imaging
Male
Malformations and congenital and or hereditary diseases involving bones. Joint deformations
Medical sciences
Nervous system (semeiology, syndromes)
Neurology
Radiography
Spinal Cord Compression - diagnosis
Spinal Cord Compression - diagnostic imaging
Spinal Cord Compression - etiology
Spinal Cord Compression - therapy
Spine
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Summary:We report the imaging findings in three symptomatic cases of partial aplasia of the posterior arch of the atlas with an isolated posterior remnant of the arch. These cases are instructive in illustrating the mechanism of cord impingement produced by the posterior arch remnant during extension of the cervical spine. Additionally, focal increased T2 signal was observed within the cord at the level of the anomaly in two of the patients.
ISSN:0195-6108
1936-959X