Safety and Efficacy of Radiotherapy Combined with Immunotherapy for Advanced Malignant Tumors.

(1) SBRT 8Gy×3f, (2) LDRT 2Gy ×3f, PD-1/L1 inhibitor, periodically, until the disease progresses or intolerable toxic side effects, (4) GM-CSF, 200ug/QD, subcutaneous injection, the first course of treatment for 7 days.