Fig. 1From: Radiotherapy for asymptomatic brain metastasis in epidermal growth factor receptor mutant non-small cell lung cancer without prior tyrosine kinase inhibitors treatment: a retrospective clinical studyOverall survival since the initiation of treatment (n = 96): The 2-year OS was 40.6 %, with a median follow-up of 26 months (range, 11–56 months), and the estimated overall survival time was 21.0 monthsBack to article page