title: Early migration of a self expanding intracranial stent: case report.
abstract: OBJECTIVE
  With the development of support devices such as stents, an increasing number of aneurysms are meeting the criteria for endovascular treatment. A range of intracranial stents currently are available with an array of characteristics. It is essential to understand the properties of these stents to determine their role and implications in endovascular treatment of cerebral aneurysms.
  
  
  METHODS
  A 45-year-old man presented to our institution with subarachnoid hemorrhage secondary to a small distal basilar trunk aneurysm.
  
  
  METHODS
  An Enterprise stent (4.5 x 14 mm) was deployed in the parent vessel across the neck of the aneurysm. Repeat angiography 2 days later demonstrated significant proximal stent migration. A second, longer overlapping Enterprise stent (4.5 x 22 mm) was deployed from the left P1 segment into the basilar artery. Complete occlusion of the basilar trunk aneurysm was noted on subsequent angiography.
  
  
  CONCLUSIONS
  This is an unequivocal case of early spontaneous migration of a self-expanding intracranial stent. We suggest caution when there is significant discrepancy in luminal diameter and suboptimal wall apposition. Early imaging following stent deployment may be indicated in these cases.
authors.affiliation: Regional Neurosciences Centre, Neuroradiology Department, Newcastle General Hospital, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, Tyne and Wear, United Kingdom. kyriakos@lobotesis.co.uk
authors.forename: Kyriakos
authors.initials: K
authors.lastname: Lobotesis
authors.forename: Anil
authors.initials: A
authors.lastname: Gholkar
authors.forename: Vijay
authors.initials: V
authors.lastname: Jayakrishnan
mesh_terms: D002533:Cerebral Angiography; D004868:Equipment Failure; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures; D015607:Stents / Q000009:adverse effects*; D013345:Subarachnoid Hemorrhage / Q000150:complications / Q000473:pathology / Q000601:surgery