Neoadjuvant Adebrelimab in Resectable SCLC: A Randomized Trial

This study is a randomized, open-label, multicenter exploratory research aiming to evaluate the efficacy and safety of Adebrelimab in combination with chemotherapy (etoposide and platinum-based therapy) as neoadjuvant treatment for resectable stage I-IIIB (stage IIIB limited to T1-4N1-2M0) small cell lung cancer (SCLC). The study is primarily conducted at Tangdu Hospital of the Fourth Military Medical University. A total of 104 patients with stage IA-IIIB SCLC (stage IIIB limited to T1-4N1-2M0) will be enrolled and randomized 1:1 to receive either Adebrelimab plus chemotherapy or chemotherapy alone. Each patient will undergo 3 cycles of study treatment followed by a 3-4 week break before surgery. Treatment will be discontinued if patients experience disease progression, intolerable drug-related adverse events, withdrawal of informed consent, or other specified conditions during the study. Effectiveness and safety outcomes will be monitored throughout the trial. The primary objective is to evaluate pathological complete response (pCR) with Adebrelimab combination therapy. Secondary objectives include assessing event-free survival (EFS), major pathological response (mPR), objective response rate (ORR), disease-free survival (DFS), and safety.