A 43-year-old male Asian non-smoker underwent surgical resection of lung mass...Bronchoscopy was performed and repeated biopsy showed the left lung mass transformed into SCLC...trunk gene mutations as EGFR 19-del mutation, TP53 and RB1 mutation...The patient sequentially received etoposide and cisplatin, anlotinib plus gefitinib...Finally, he died after one cycle of etoposide and carboplatin plus durvalumab treatment in March 2020.