A 73-year-old man visited our hospital...and was diagnosed with stage IV lung adenocarcinoma with L858R point mutation in exon 21….He received first-line therapy with dacomitinib (30 mg, daily) plus bevacizumab (7.5 mg/kg, every 3 weeks). The results of follow-up imaging performed after 3 months showed decreased primary tumor size in chest CT...and improved brain metastasis in brain MRI...