Trial Identifiers
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Scientific Title
A Randomized, Double-blind, Placebo-controlled Phase 3 Study of Pembrolizumab (MK-3475) in Combination With Concurrent Chemoradiation Therapy Followed by Pembrolizumab With or Without Olaparib (MK-7339), Compared to Concurrent Chemoradiation Therapy Alone in Participants With Newly Diagnosed Treatment-Naïve Limited-Stage Small Cell Lung Cancer (LS-SCLC)
Commercial Sponsor
Merck
Summary
Eligible patients will be randomised into one of three groups. In Group A, participants will receive 4 cycles of standard-of-care chemotherapy (etoposide/platinum) plus 200mg of pembrolizumab every 3 weeks concurrently with standard thoracic radiotherapy. This will be followed by 9 cycles of pembrolizumab (400 mg every 6 weeks) plus an olaparib matching placebo twice daily for 12 months or until specific discontinuation criteria are met. Group B participants will also receive 4 cycles of standard-of-care chemotherapy (etoposide/platinum) plus 200mg pembrolizumab every 3 weeks concurrently with standard thoracic radiotherapy. This will be followed by 9 cycles of pembrolizumab (400 mg every 6 weeks) plus 300mg olaparib 300 mg twice daily for 12 months or until specific discontinuation criteria are met. Participants in Group C will receive 4 cycles of standard-of-care chemotherapy (etoposide/platinum), this time with a pembrolizumab-placebo (saline) every 3 weeks concurrently with standard thoracic radiotherapy. This will be followed by 9 cycles of pembrolizumab-placebo (saline) every 6-weeks, plus a olaparib matching placebo for 12 months or until specific discontinuation criteria are met.