[Efficacy and safety of Anlotinib as a third-line chemotherapy for metastatic colorectal cancer].

Objective To evaluate the efficacy and safety of Anlotinib as a third-line therapy in patients with metastatic colorectal cancer. Methods Anlotinib was administered to patients with advanced colorectal cancer who had received ≥ second-line standardized treatment, with 12 mg daily lasting for 2 weeks and withdrawal of drugs for a week. The relevant clinical information and treatment protocols were recorded.The efficacy and safety of anlotinib were followed up. Results A total of 26 patients were enrolled in the study group, and 24 patients could be evaluated, including 2 cases of partial response (PR) and 16 cases of stable disease (SD).The object response rate (ORR) and disease control rate (DCR) were 8.3% and 75%, respectively. The median progression-free survival (PFS) and overall survival (OS) was 4.3 months (95% CI: 2.9-5.7 months) and 14.7 months (95% CI: 10.0-19.4 months), respectively. The most common adverse reactions were fatigue in 17 cases (17/26) and hand-foot skin reactions in 16 cases (16/26). Analysis of Kaplan-Meier revealed that without liver metastasis (95% CI: 11.7-32.3, P=0.011) and left-sided colonic cancer (95% CI: 11.7-46.1, P=0.014) were related to longer OS. Conclusion Anlotinib as a third-line therapy for advanced colorectal cancer is feasible with high disease control rate and minor side effects. Key words: Metastatic colorectal cancer; Anlotinib; Targeted therapy; Clinical effects