title: Delayed coil migration from a small wide-necked aneurysm after stent-assisted embolization: case report and literature review.
abstract: BACKGROUND
  We present a previously unreported complication following the treatment of a patient with two small, wide-necked, posterior communicating artery aneurysms.
  
  
  METHODS
  Endovascular embolization of one aneurysm was performed using a stent-assisted technique. Follow-up angiography 5 months later revealed that a coil had escaped the confinement of the stent and migrated distally without occluding any arterial branches or causing symptoms. This case report demonstrates that although a rare occurrence, a coil can break loose from the stent.
  
  
  CONCLUSIONS
  We discuss the potential mechanisms of this phenomenon and review the literature on stent-assisted aneurysm coiling in order to raise awareness of this event when embolizing small, wide-necked aneurysms with a stent-assisted technique.
authors.affiliation: Department of Diagnostic and Interventional Radiology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, People's Republic of China. browngao@yahoo.com.cn
authors.forename: Bu-Lang
authors.initials: BL
authors.lastname: Gao
authors.forename: Ming-Hua
authors.initials: MH
authors.lastname: Li
authors.forename: Yong-Li
authors.initials: YL
authors.lastname: Wang
authors.forename: Chun
authors.initials: C
authors.lastname: Fang
mesh_terms: D015901:Angiography, Digital Subtraction; D004621:Embolization, Therapeutic / Q000009:adverse effects*; D004868:Equipment Failure; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000628:therapy*; D008875:Middle Aged; D015607:Stents / Q000009:adverse effects*