Delayed coil migration from a small wide-necked aneurysm after stent-assisted embolization: case report and literature review.
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.
Gao
Bu-Lang
BL
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
Li
Ming-Hua
MH
Wang
Yong-Li
YL
Fang
Chun
C
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*