1.
AJNR Am J Neuroradiol
; 25(9): 1619-21, 2004 Oct.
Article
in English
| MEDLINE
| ID: mdl-15502151
ABSTRACT
During color Doppler examination of a 41-year-old man who presented with vertigo, a right vertebral artery could not be found. Both MR angiography and digital subtraction angiography revealed a large anastomotic vessel between the right internal carotid and vertebral artery. It was thought to be type I proatlantal artery. Furthermore, the external carotid arteries were bilaterally absent. Although each vascular anomaly mentioned above is rare, it even more rare for these variations to occur simultaneously.