EGFR and non-small cell lung carcinoma: There is no high-level evidence for the time of whole brain radiotherapy (WBRT) for patients with epidermal growth factor receptor (EGFR)-mutated non-small cell lung cancer (NSCLC) and brain metastases.The aim of this study is to assess the appropriate timing of WBRT for patients with EGFR-mutated NSCLC and brain metastases (BM).