Domestic device for destruction of tumors by microwave power was designed. Initial series of laboratory experiments were performed with microwave liver ablation. Primary series of patients with colorectal cancer metastases to the liver demonstrate positive results. Short-term exposure, programmable shapes and sizes of ablative zones are the distinctive advantages of microwave thermoablation (MTA). 329 patients underwent liver resections during 2005-2010 years.108 patients had colorectal cancer metastases to the liver. 52 (48,14%) patients had bilobar liver lesions. Among them 11 patients underwent liver resection combined with MTA of contralateral liver lesions. Reliable differences in survival rates among patients with monolobar and bilobar metastatic lesions were not observed. Median of survival rate amounted 22.8 months in patients operated for metastatic colorectal cancer. Variants of surgical treatment are proposed.