The persistent fetal carotid-vertebrobasilar anastomoses
| Autor: | R C Wallace, Thomas A. Tomsick, G Y Luh, B L Dean |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Adult
Intracranial Arteriovenous Malformations Male medicine.medical_specialty Anastomosis Magnetic resonance angiography Humans Medicine Radiology Nuclear Medicine and imaging Vertebral Artery Aged Fetus medicine.diagnostic_test business.industry General Medicine Anatomy Middle Aged Cerebral Angiography Surgery Adult life Carotid Arteries medicine.anatomical_structure Basilar Artery Embryology Trigeminal artery Female business Magnetic Resonance Angiography Cerebral angiography Artery |
| Zdroj: | American Journal of Roentgenology. 172:1427-1432 |
| ISSN: | 1546-3141 0361-803X |
| DOI: | 10.2214/ajr.172.5.10227532 |
| Popis: | T he primitive trigeminal, otic (acoustic), hypoglossal, and proatlantal intersegmental arteries are persistent fetal anastomoses between the carotid and vertebrobasilar circulations (Fig. 1). These fetal anastomoses emerge at the 4to 5mm embryonic stage, persist for approximately 1 week, and regress at roughly the rate at which the posterior communicating and vertebral arteries develop. The first to disappear, and the rarest, is the otic artery, followed by the hypoglossal artery, the trigeminal artery, and then the proatlantal intersegmental artery. Occasionally, persistence of these vessels is noted after birth and into adult life. The purpose of this pictorial essay is to review the embryology and anatomy of the persistent fetal carotid-vertebrobasilar anastomoses with the emphasis on learning to recognize these on MR angiography. In addition. we report the first case, to our knowledge, of a persistent hypoglossal artery identified on MR angiography. |
| Databáze: | OpenAIRE |
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