[Efficacy of Avastin in combination with irinotecan for metastatic colorectal cancer]

To evaluate the efficacy of Avastin in combination with irinotecan for metastatic colorectal cancer.Ninety patients were randomly divided into 3 equal groups to receive Avastin plus irinotecan (group A), FOLFIRI (group B) and FOLFOX7 (group C) for two cycles, respectively. The response rate and changes in tumor maker levels were observed.The tumor response rate was 43.3% in group A, 27.7% in group B and 30.0% in group C. The disease control rate (complete response+partial response+stable disease) was 80% in group A, 53.3% in group B and 50.0% in group C. Obvious changes in tumor marker levels were observed in the 3 groups after treatment, which were most conspicuous in group A (P0.05).The addition of Avastin to irinotecan chemotherapy results in significant improvement of clinical efficacy in patients with metastatic colorectal cancer.