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Hepatic metastatic disease affects more than half of the patients with colorectal cancer and neuroendocrine cancer. Hepatic resection remains the gold standard for liver metastasis from colorectal and neuroendocrine primaries. Thermal ablative technologies, however, are increasingly being used either alone or in combination with resection to treat this group of patients. Radiofrequency ablation is the most common modality used in the United States, whereas microwave ablation has been more widely used in the East. In addition to being adjuncts to hepatic resection, ablation has gained an increased popularity in the management of patients who are not operative candidates or have unresectable colorectal or neuroendocrine hepatic metastasis. Although radiofrequency ablation seems to have a higher local recurrence than resection, ablation remains an important therapeutic option for many patients with hepatic metastasis. [ABSTRACT FROM AUTHOR]