RT Journal Article SR Electronic T1 Proximal migration and compaction of an Enterprise stent into a coiled basilar apex aneurysm: a posterior circulation phenomenon? JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP 356 OP 358 DO 10.1136/jnis.2010.002444 VO 2 IS 4 A1 Shervin R Dashti A1 David Fiorella A1 Maria M Toledo A1 Yin Hu A1 Cameron G McDougall A1 Felipe C Albuquerque YR 2010 UL http://jnis.bmj.com/content/2/4/356.abstract AB A patient with a giant partially thrombosed basilar apex aneurysm was treated with balloon-assisted coil embolization. At the conclusion of the embolization, an Enterprise stent was placed from the upper basilar artery to the left P1 segment. Follow-up angiography 4 months later showed that the distal stent had pulled out of the posterior cerebral artery and was in the coil mass within the aneurysm. Angiography clearly showed that the stent had migrated down the basilar artery and that the artery was now kinked proximal to the stent. Nonetheless, the left posterior cerebral artery and the basilar artery were still widely patent. This is the first documented case in which a stent ‘compacted’ into a completed coiled aneurysm in a delayed fashion.