RT Journal Article
SR Electronic
T1 Cerebellar arteries originating from the internal carotid artery.
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1229
OP 1235
VO 14
IS 5
A1 M Siqueira
A1 R Piske
A1 M Ono
A1 R Marino Júnior
YR 1993
UL http://www.ajnr.org/content/14/5/1229.abstract
AB PURPOSE To study the incidence of cerebellar arteries originating directly from the internal carotid artery, and to discuss the probable embryological origin and clinical implications of this anatomical anomaly.METHODS We reviewed 5500 angiographic studies done at our institution in the last 4 years, searching for these anomalous vessels as well as for other anatomical variants.RESULTS Eleven cerebellar arteries originating directly from the internal carotid artery and nine embryonic cerebral arteries were found.CONCLUSION These arteries are considered persistent trigeminal artery variants and seem to occur as the result of the persistence of a primitive trigeminal artery associated with an incomplete fusion of the longitudinal neural arteries. These anomalous vessels are clinically significant particularly because of their role in endovascular therapeutic and surgical complications and the paradoxical lesions in the cerebellum that occur as a result of carotid disease.