Delayed coil migration from a small wide-necked aneurysm after stent-assisted embolization: case report and literature review

Neuroradiology. 2006 May;48(5):333-7. doi: 10.1007/s00234-005-0044-1. Epub 2006 Apr 6.


Introduction: 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.

Discussion: 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.

Publication types

  • Case Reports
  • Review

MeSH terms

  • Angiography, Digital Subtraction
  • Embolization, Therapeutic / adverse effects*
  • Equipment Failure
  • Female
  • Humans
  • Intracranial Aneurysm / diagnostic imaging
  • Intracranial Aneurysm / therapy*
  • Middle Aged
  • Stents / adverse effects*