RT Journal Article
SR Electronic
T1 Retreatment of Previously Embolized Cerebral Aneurysms: The Risk of Further Coil Embolization Does Not Negate the Advantage of the Initial Embolization
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1401
OP 1404
DO 10.3174/ajnr.A1098
VO 29
IS 7
A1 S.A. Renowden
A1 P. Koumellis
A1 V. Benes
A1 W. Mukonoweshuro
A1 A.J. Molyneux
A1 N.S. McConachie
YR 2008
UL http://www.ajnr.org/content/29/7/1401.abstract
AB BACKGROUND AND PURPOSE: A significant minority of aneurysms treated by endovascular means undergo additional subsequent therapy to treat aneurysm recurrence. Our study was undertaken to determine the risk of additional coil embolization of aneurysms recurring following endovascular therapy.MATERIALS AND METHODS: Patients were identified during a 10-year period from prospectively collated data bases at 2 different neuroscience institutions. Patient outcome was obtained from the data bases or the patient's neurosurgical records. Occlusion grade was assessed at the time of treatment and at follow-up angiography as complete, near-complete, or incomplete.RESULTS: Of a total of 1834 aneurysms in 1631 patients, 100 aneurysms in 99 patients treated between January 1996 and December 2005 required additional coiling because of an enlarging remnant and subtotal occlusion. This comprised 6% of the patients treated and 8% of the total followed. Thromboembolic events complicated 3 retreatment procedures, but all 3 patients remain independent. Ninety-five patients were followed for 8–103 months (mean, 42.3 months) by conventional or MR angiography.CONCLUSION: Coil embolization of aneurysm recurrences has a low complication rate and leads to satisfactory occlusion in most cases. The risk from additional coil embolization does not negate the advantage of the initial embolization.