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• W4387206474 abstract "Adjuvant radiotherapy (RT) improves progression-free survival (PFS) in atypical meningiomas. Herein, we assess whether the treatment-related acute and long-term toxicity of upfront RT in atypical meningioma patients versus surveillance merits the PFS benefit.In our prior single institution retrospective study of 230 patients with resected intracranial atypical meningiomas between 2000-2015, adjuvant RT was associated with a significantly lower risk of progression/recurrence compared to surveillance (HR = 0.21 [95% CI 0.11-0.41]; p<0.01), with 36% of surveillance patients eventually requiring salvage RT. In the current study, the acute (≤6 months) and long term (>6 months) RT-related toxicities from the same patient cohort for those who received adjuvant RT (n = 51) were evaluated and compared to those who received salvage RT (n = 64) in the surveillance group. Additionally, overall treatment-related toxicity at time of last follow up was obtained for comparison between the adjuvant RT (n = 51) vs surveillance (n = 179) group. All toxicities were graded per CTCAE v5.0. Kaplan-Meier analysis was used to calculate the cumulative incidence of toxicities; Pearson's chi-squared and log-rank test were used for comparison.Adjuvant RT as compared to salvage RT was generally associated with greater RT-related toxicities both in the acute (90% vs 69%, p = 0.006) and long term (57% vs 33%, p = 0.010). While there was no significant difference in grade 3-4 acute toxicities, long term grade 3-4 toxicities (including headache, seizure, vision loss, neuromotor deficit, and neurocognitive deficit) were present in 14% of adjuvant vs 3% of salvage RT group (p = 0.035). Radionecrosis occurred in 18% of adjuvant RT vs 8% of salvage RT group (p = 0.11). Between adjuvant RT vs surveillance groups, any-treatment related toxicity at last follow up was greater with adjuvant RT (31% vs 15%; p = 0.006), with trend towards greater grade 3-4 toxicities (including headache, vision loss, neuromotor deficit, neurocognitive deficit, and cerebral edema) as well (8% vs 3%; p = 0.101). Cumulative incidence of treatment-related neuromotor deficit (any grade) was significantly greater in the adjuvant RT vs surveillance group with 14% vs 2% at 10 years (p = 0.004). There was no difference in rate of cerebrovascular accident between adjuvant RT (6%) vs surveillance (4%) groups (p = 0.83).Adjuvant RT for patients with atypical meningioma was associated with greater acute and long-term treatment toxicities. Potential RT-related toxicity and impact on quality-of-life should thus be carefully weighed against the tumor control benefit of RT in deciding the optimal use and timing of RT." @default.
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• W4387206474 date "2023-10-01" @default.
• W4387206474 modified "2023-10-17" @default.
• W4387206474 title "Adjuvant Radiotherapy in Atypical Meningioma: Are the Risks Worth the Benefit?" @default.
• W4387206474 doi "https://doi.org/10.1016/j.ijrobp.2023.06.918" @default.
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