Etoposide Plus Benmelstobart Followed by Maintenance Therapy of Benmelstobart Plus Anlotinib in First-line Treatment of Elderly Patients with Extensive Stage Small Cell Lung Cancer: a Single-arm, Prospective Trial

This is a prospective, single-arm clinical study to evaluate the efficacy and safety of etoposide in combination with bemosubezumab and sequential Benmelstobart in combination with Anlotinib as first-line treatment for elderly patients with extensive small-cell lung cancer. Participants who met the inclusion criteria were selected to enter the study and received etoposide combined with Benmelstobart followed by bemosubezumab combined with Anlotinib. The primary endpoint was PFS (Progression-free Survival), the secondary endpoint was OS (Overall Survival) and safety (CTCAE 5.0), and the exploratory endpoint was the screening of various potential molecular markers.