EGFR and non-small cell lung carcinoma: Recently, evidence regarding the efficacy of stereotactic radiosurgery (SRS) for a few (four or less) small (< 3 cm) brain metastases has been gradually accumulated.18, 19 A retrospective study of EGFR‐mutant NSCLC patients with BMs suggested increased survival with a combination of upfront SRS and EGFR‐TKI compared to that with TKI monotherapy.20