Radiofrequency ablation of colorectal liver metastases: long-term survival

To evaluate the results of radiofrequency ablation (RFA) therapy with regard to long-term survival and rate of complications in patients with liver metastases from colorectal carcinoma.

A total of 102 patients were included and treated with RFA. In 100 patients, resection was not possible; two patients refused surgery. The patients had a total of 332 colorectal liver metastases. Pre- and post-treatment evaluation was performed with contrast-enhanced computed tomography. Survival from time of diagnosis of liver metastases was calculated by Kaplan-Meier analysis. Complications were recorded as minor or major in accordance with the definitions of the Society for Cardiovascular and Interventional Radiology.

Estimated median survival from time of diagnosis of liver metastases was 52 months (95% CI 34-82). Estimated 1-, 2-, 3-, 4-, and 5-year survival was 96%, 79%, 64%, 52%, and 44%, respectively. Minor complications were recorded following seven RFA treatments (4.0%) and major complications following 12 RFA treatments (6.9%).

RFA is an effective method to treat liver metastases from colorectal carcinoma. Survival is improved and comparable with survival following surgical resection. The rate of complications is low.