Auto-HSCT-Supported Dose-Dense Chemotherapy with Adebrelimab As First-Line Treatment for ES-SCLC

"Induction:~Two 21-day cycles of standard-dose etoposide 80-100 mg/m² on days 1-3 and carboplatin AUC 5-6 on day 1.~Those without disease progression will advance to consolidation treatment.~Consolidation:~Stem cell mobilization with G-CSF will be start when white blood cell count is at its nadir post-chemotherapy.~After recovery, peripheral blood stem cells will be collected via apheresis, evaluated, and cryopreserved if adequate.~Dose-dense etoposide 160-200 mg/m² on days 1-3 and carboplatin AUC 10-12 on day 1 for two 21-day cycles.~Within 48-72 hours after the first cycle, autologous peripheral blood stem cells will be reinfused with G-CSF.~Further consolidation will depend on hematopoietic recovery with standard-dose EC plus adebrelimab 1200 mg on day 1 for four 21-day cycles.~Maintenance:~Adebrelimab 1200 mg every 21 days will be given until disease progression, intolerable toxicity, death, patient withdrawal, or investigator decision."