PT - JOURNAL ARTICLE AU - Kenji Yagi AU - Koichi Satoh AU - Junichiro Satomi AU - Shinji Nagahiro TI - Primitive Vertebrobasilar System Associated with a Ruptured Aneurysm DP - 2004 May 01 TA - American Journal of Neuroradiology PG - 781--783 VI - 25 IP - 5 4099 - http://www.ajnr.org/content/25/5/781.short 4100 - http://www.ajnr.org/content/25/5/781.full SO - Am. J. Neuroradiol.2004 May 01; 25 AB - Summary: Persistent primitive lateral vertebrobasilar (PPLVB) anastomosis is a rare remnant of early fetal development whose occurrence, to our knowledge, has been reported only once. We now report a new variant in which the basilar artery was fed primarily by a PPLVB anastomosis because on one side the vertebrobasilar junction was incompletely developed and on the other it was aplastic. Aneurysmal rupture in this case may be attributable to excessive hemodynamic stress.