RecruitingProcedureBAI-BACE for Advanced Lung Squamous Cell CarcinomaBronchial arterial infusion plus bronchial arterial chemoembolization (BAI-BACE) has been reported as non-first-line therapy to treat lung cancer in many hospitals in China. BAI, which uses chemotherapeutic drugs directly injected into the tumor and achieved a high concentration in a short time to kill the tumor. Then BACE could seal off the tumor vessels. In this study, we aim to describe the efficacy and safety of BAI-BACE as non-first-line for advanced lung squamous cell carcinoma.