JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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EGFR TKIs plus WBRT Demonstrated No Survival Benefit Other Than That of TKIs Alone in Patients with NSCLC and EGFR Mutation and Brain Metastases.

INTRODUCTION: Whether EGFR tyrosine kinase inhibitors (TKIs) plus whole brain radiation therapy (WBRT) provide a better survival benefit than EGFR TKIs alone remains undetermined in patients with NSCLC with EGFR mutation and brain metastases (BMs).

METHODS: A total of 230 patients with NSCLC with EGFR mutation and BM were identified. Within this group, 116 patients received EGFR TKIs alone (as first-line therapy in 91 cases) and 51 patients received EGFR TKIs plus WBRT therapy (as first-line treatment in 30 cases).

RESULTS: Compared with TKIs alone, EGFR TKIs plus WBRT had no superior intracranial progression-free survival (PFS) (6.9 versus 7.4 months [p = 0.232]) and systemic PFS (7.5 versus 7.9 months [p = 0.546]) but were associated with worse overall survival (OS) (21.6 versus 26.4 months [p = 0.049]) in NSCLC with EGFR mutation and BM. Chemotherapy plus WBRT was shown to have an intracranial PFS (5.2 versus 5.9 months [p = 0.339]) and OS (10.5 versus 11.0 months [p = 0.977]) similar to those with chemotherapy alone in patients with EGFR of unknown or wild-type status. In multivariate analysis, EGFR mutation was found to be an independent risk factor for BM (hazard ratio = 1.476, p = 0.039) and also a significant independent prognostic factor for OS in patients with NSCLC with BM (hazard ratio = 0.601, p = 0.028).

CONCLUSIONS: The addition of WBRT to EGFR TKIs did not appear to have survival benefit superior to that of EGFR TKIs alone in with EGFR-mutant NSCLC with BM. WBRT also did not bring additional benefit to chemotherapy in patients with BM and EGFR of wild-type or unknown status.

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