RT Journal Article SR Electronic T1 A hyperplastic anterior choroidal artery with double persistent anastomotic channels. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1758 OP 1760 VO 19 IS 9 A1 C J Chen A1 A J Barkovich YR 1998 UL http://www.ajnr.org/content/19/9/1758.abstract AB We describe a case of a hyperplastic anterior choroidal artery (AChA) with double persistent anastomotic channels. This hyperplastic AChA, which was detected at vertebral angiography, is different from previously reported cases, because it has an unusual, secondary anastomotic channel.