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Regional treatment of metastasis: surgery of colorectal liver metastases.

The liver is the most common and often the only site of metastases in patients with colorectal cancer. Approximately 50% of colorectal primaries are complicated by liver metastases. The median survival of untreated patients ranges from 6 to 18 months [1]. Using current criteria, resection can be carried out in only 10% to 20% of patients with colorectal liver metastases. Resection is the only hope of long-term survival, with a rate of 30% to 40% at 5 years [2].