The transclival artery: a variant persistent carotid-basilar arterial anastomosis not previously reported.

Publisher: BMJ Publishing Group Country of Publication: England NLM ID: 101517079 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1759-8486 (Electronic) Linking ISSN: 17598478 NLM ISO Abbreviation: J Neurointerv Surg Subsets: MEDLINE

Original Publication: London : BMJ Publishing Group, c2009-

Basilar Artery/*abnormalities ; Basilar Artery/*diagnostic imaging ; Carotid Artery, Internal/*abnormalities ; Carotid Artery, Internal/*diagnostic imaging ; Vascular Malformations/*diagnostic imaging; Aneurysm/diagnostic imaging ; Aneurysm/etiology ; Computed Tomography Angiography ; Female ; Follow-Up Studies ; Humans ; Middle Aged ; Vascular Malformations/complications

During embryological development, primitive anastomoses exist between the carotid and vertebrobasilar arteries. These anastomoses typically regress or are incorporated into the developing vasculature. Persistence beyond fetal development, however, results in vascular anomalies that alter haemodynamic flow with a predisposition for aneurysm formation. The carotid-vertebrobasilar anastomoses mirror the primitive communications and include (from most to least common) the trigeminal, hypoglossal, proatlantal and otic arteries. The hypoglossal and proatlantal variants extend through the hypoglossal canal or foramen magnum, respectively. We present a previously undescribed variant of these persistent fetal anastomoses, the 'transclival artery', which courses through its own transclival skull base canal/foramen.
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Keywords: Aneurysm; Angiography; Artery; Blood Flow; Congenital

Date Created: 20160721 Date Completed: 20170419 Latest Revision: 20181202

20231215

10.1136/neurintsurg-2016-012464.rep

27436405