RT Journal Article SR Electronic T1 Fractionated Stereotactic Sequential Boost in a Selected Cohort of Glioblastoma Patients: A Mono-institutional Analysis JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 3387 OP 3393 DO 10.21873/anticanres.14322 VO 40 IS 6 A1 ALESSANDRO MARCHIONNI A1 ISABELLA PALUMBO A1 GIAMPAOLO MONTESI A1 VITTORIO BINI A1 CLAUDIO ZUCCHETTI A1 NUNZIA CENCI A1 PIETRO CHIARINI A1 STEFANO SACCIA A1 CYNTHIA ARISTEI A1 MARCO LUPATTELLI YR 2020 UL http://ar.iiarjournals.org/content/40/6/3387.abstract AB Aim: To retrospectively assess toxicity and survival in 15 selected Glioblastoma patients treated with a sequential fractionated stereotactic radiotherapy (FSRT) boost after chemo-radiotherapy (CHT-RT) and compare their survival outcomes with a control group. Patients and Methods: Toxicity was assessed with the CTCAE 3.0 scale. The Kaplan-Meier method was used to design survival curves, log-rank test for bivariate analysis and Cox proportional hazard regression model for multivariate analysis. Results: The median follow-up was 16 months (range=5-60). One case of headache and one of radionecrosis (RN) occurred. Median overall survival (OS) was 25 months in the boost group vs. 14 in the no-boost group (p=0.004). Median progression-free survival (PFS) was 15 months in the boost group versus 8 in the no-boost group (p=0.046). At multivariate analysis FSRT boost resulted significantly associated with OS and PFS. Conclusion: In our series a sequential FSRT boost resulted in safe outcomes and significantly associated with survival.