Study of Pembrolizumab, Lenvatinib and Chemotherapy Combination in First Line Extensive-stage Small Cell Lung Cancer

This is a multicenter, open-label, non-randomized, single arm, 2 parts, phase II clinical trial evaluating the efficacy and safety of pembrolizumab and lenvatinib plus standard of care chemotherapy (with carboplatin and etoposide ) in subjects with histologically confirmed extensive-stage small-cell lung cancer who have not previously received systemic therapy for this malignancy.