RT Journal Article SR Electronic T1 Unusual dissection of the proximal vertebral artery: description of three cases. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 283 OP 286 VO 13 IS 1 A1 Friedman, D P A1 Flanders, A E YR 1992 UL http://www.ajnr.org/content/13/1/283.abstract AB We report three cases that reveal an array of etiologic and radiologic findings associated with dissection of the proximal segment of the vertebral arteries. Regardless of etiology, the proximal segment may be the principal site of dissection in these vessels.