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RT Journal Article
SR Electronic
T1 Risk Factor Analysis of Recanalization Timing in Coiled Aneurysms: Early versus Late Recanalization
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1765
OP 1770
DO 10.3174/ajnr.A5267
VO 38
IS 9
A1 Jeon, J.P.
A1 Cho, Y.D.
A1 Yoo, D.H.
A1 Moon, J.
A1 Lee, J.
A1 Cho, W.-S.
A1 Kang, H.-S.
A1 Kim, J.E.
A1 Han, M.H.
YR 2017
UL http://www.ajnr.org/content/38/9/1765.abstract
AB BACKGROUND AND PURPOSE: Long-term documentation of anatomic and angiographic characteristics pertaining to the timing of recanalization in coiled aneurysms has been insufficient. Our intent was to analyze and compare early and late-phase recanalization after coiling, identifying respective risk factors.MATERIALS AND METHODS: A total of 870 coiled saccular aneurysms were monitored for extended periods (mean, 30.8 ± 8.3 months). Medical records and radiologic data were also reviewed, stratifying patients as either early (n = 128) or late (n = 52) recanalization or as complete occlusion (n = 690). Early recanalization was equated with confirmed recanalization within 6 months after the procedure, whereas late recanalization was defined as verifiable recanalization after imaging confirmation of complete occlusion at 6 months. A multinomial regression model served to assess potential risk factors, the reference point being early recanalization.RESULTS: Posterior circulation (P = .009), subarachnoid hemorrhage at presentation (P = .011), second attempt for recanalized aneurysm (P &lt; .001), and aneurysm size &gt;7 mm (P &lt; .001) emerged as variables significantly linked with early recanalization (versus complete occlusion). Late (versus early) recanalization corresponded with aneurysms ≤7 mm (P = .013), and in a separate subanalysis of lesions ≤7 mm, aneurysms 4–7 mm showed a significant predilection for late recanalization (P = .008). However, the propensity for complete occlusion in smaller lesions (≤7 mm) increased as the size diminished.CONCLUSIONS: Although long-term complete occlusion after coiling was more likely in aneurysms ≤7 mm, such lesions were more prone to late (versus early) recanalization, particularly those of 4–7 mm in size. Long-term follow-up imaging is thus appropriate in aneurysms &gt;4 mm to detect late recanalization of those formerly demonstrating complete occlusion.