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Stereotactic Radiosurgery With Versus Without Embolization for Brain Arteriovenous Malformations

CJ. Chen, D. Ding, CC. Lee, KN. Kearns, IJ. Pomeraniec, CP. Cifarelli, DE. Arsanious, R. Liscak, J. Hanuska, BJ. Williams, MB. Yusuf, SY. Woo, N. Ironside, RE. Warnick, DM. Trifiletti, D. Mathieu, M. Mureb, C. Benjamin, D. Kondziolka, CE....

. 2021 ; 88 (2) : 313-321. [pub] 20210113

Language English Country United States

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc21019449
E-resources Online Full text

NLK ProQuest Central from 2010-01-01 to 2021-12-31
Health & Medicine (ProQuest) from 2010-01-01 to 2021-12-31

Links

PubMed 33017465
DOI 10.1093/neuros/nyaa418
Knihovny.cz E-resources

BACKGROUND: Prior comparisons of brain arteriovenous malformations (AVMs) treated using stereotactic radiosurgery (SRS) with or without embolization were inherently flawed, due to differences in the pretreatment nidus volumes. OBJECTIVE: To compare the outcomes of embolization and SRS, vs SRS alone for AVMs using pre-embolization malformation features. METHODS: We retrospectively reviewed International Radiosurgery Research Foundation AVM databases from 1987 to 2018. Patients were categorized into the embolization and SRS (E + SRS) or SRS alone (SRS-only) cohorts. The 2 cohorts were matched in a 1:1 ratio using propensity scores. Primary outcome was defined as AVM obliteration. Secondary outcomes were post-SRS hemorrhage, all-cause mortality, radiologic and symptomatic radiation-induced changes (RIC), and cyst formation. RESULTS: The matched cohorts each comprised 101 patients. Crude AVM obliteration rates were similar between the matched E + SRS vs SRS-only cohorts (48.5% vs 54.5%; odds ratio = 0.788, P = .399). Cumulative probabilities of obliteration at 3, 4, 5, and 6 yr were also similar between the E + SRS (33.0%, 46.4%, 56.2%, and 60.8%, respectively) and SRS-only (32.9%, 46.2%, 56.0%, and 60.6%, respectively) cohorts (subhazard ratio (SHR) = 1.005, P = .981). Cumulative probabilities of radiologic RIC at 3, 4, 5, and 6 yr were lower in the E + SRS (25.0%, 25.7%, 26.7%, and 26.7%, respectively) vs SRS-only (45.3%, 46.2%, 47.8%, and 47.8%, respectively) cohort (SHR = 0.478, P = .004). Symptomatic and asymptomatic embolization-related complication rates were 8.3% and 18.6%, respectively. Rates of post-SRS hemorrhage, all-cause mortality, symptomatic RIC, and cyst formation were similar between the matched cohorts. CONCLUSION: This study refutes the prevalent notion that AVM embolization negatively affects the likelihood of obliteration after SRS.

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