This study will enrol 30 subjects at 3 sites in China. Subjects who fulfil all the inclusion criteria and none of the exclusion criteria will be enrolled and receive treatment with Durvalumab and EP for 4 cycles. Durvalumab will be administered at a dose of 1500 mg every 3 weeks (Q3W) with first-line chemotherapy and will continue to be administered as monotherapy every 4 weeks(Q4W) post-chemotherapy until progressive disease. The LDRT deals with primary tumour in a 15 Gy of 5 fractions over five days, starting from Day 1 in the first cycle. Subjects will attend safety follow up 12 weeks ±14 days after last dose of Durvalumab. The primary endpoint is mPFS.
The purpose of this study was to evaluate the efficacy of low-dose radiotherapy (LDRT) combined with durvalumab, etoposide, and cisplatin/carboplatin in the first-line treatment of extensive-stage small cell lung cancer.