Hypofractionated Radiotherapy Followed by Chemo-immunotherapy Induction Therapy

Radiotherapy can activate local and systemic immune responses through a variety of mechanisms, which can enhance anti-tumor immune effects. The dose fractionation pattern of radiotherapy has an important influence on the occurrence of immune-induced effects. Stereotactic body radiation therapy (SBRT) has obvious advantages in activating interferon effects and inducing abscopal effects. SBRT combined with immunity can enhance the abscopal effect induced by radiotherapy and play a synergistic role. The 8Gy×3 fractionation scheme is currently the most widely used stereotactic radiotherapy scheme. Because we conducted this study, the primary lesion received large-fraction partial tumor irradiation and then received adebrelimab combined with chemotherapy induction treatment for 2 cycles, followed by sequential chest radiotherapy for the treatment of limited-stage small cell lung cancer, to explore the effectiveness and safety.

NCT Number	NCT06914050
Lead Sponsor	Tianjin Medical University Cancer Institute and Hospital
Conditions	Lung Cancer, Small Cell, Limited-stage Small Cell Lung Cancer (LS-SCLC)
Enrollment	30 participants
Start Date	2025-04
Primary Completion	2026-04 (estimated)
Study Completion	2028-04 (estimated)
Updated on ClinicalTrials.gov	2025-04-25