Radiofrequency Ablation Followed By Hepatic Artery Chemotherapy in Treating Patients With Colorectal Cancer That Has Spread to the Liver

RATIONALE: Radiofrequency ablation may be able to shrink or destroy cancer cells. Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Chemotherapy delivered directly into the blood vessels of the liver may prevent new tumors from growing. Combining these therapies may be an effective treatment for colorectal cancer that has spread to the liver. PURPOSE: Phase II trial to study the effectiveness of radiofrequency ablation followed by chemotherapy delivered directly into the blood vessels of the liver in treating patients who have colorectal cancer that has spread to the liver.