This study is a prospective, multicenter, randomized, phase II clinical study. 87 patients will be recruited.~Group A (low dose group)~Intrapleural injection of bevacizumab 2.5mg/kg/times, d1, d8; 21 days for a course of treatment. Subjects will received two courses of treatment if there is no termination of treatment listed in the standard.~Group B (medium dose group)~Intrapleural injection of bevacizumab 5mg/kg/times, d1, d8; 21 days for a course of treatment. Subjects will received two courses of treatment if there is no termination of treatment listed in the standard.~Group C (high dose group)~Intrapleural injection of bevacizumab 7.5mg/kg/times, d1, d8; 21 days for a course of treatment. Subjects will received two courses of treatment if there is no termination of treatment listed in the standard.~Main evaluation criteria: pleural effusion objective response rate(ORR) (WHO standard)~Secondary evaluation criteria: pleural fluid time to progression (TTP), overall survival (OS), ORR, QOL scores (Quality of Life Questionnaire-lung cancer) and KPS, and safety (NCI CTCAE V4.03)
The purpose of this study is to explore the efficacy and safety of different doses of bevacizumab injection in the treatment of malignant pleural effusion in patients with advanced non-squamous non-small cell lung cancer.