RT Journal Article SR Electronic T1 Complete Duplication or Extreme Fenestration of the Basilar Artery JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 149 OP 150 VO 20 IS 1 A1 Goldstein, Jonas H. A1 Woodcock, Richard A1 Do, Huy M. A1 Phillips, C. Douglas A1 Dion, Jacques E. YR 1999 UL http://www.ajnr.org/content/20/1/149.abstract AB Summary: We describe a 42-year-old man with complete duplication or extreme fenestration of the basilar artery. We review the developmental anatomy and embryology and discuss the possible clinical implications and associated findings of this anomaly.