Combination Chemotherapy in Treating Patients With Unresectable Liver Metastases From Colorectal Cancer

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Cryosurgery kills cancer cells by freezing them. Combining more than one chemotherapy drug with cryosurgery and giving drugs in different ways may kill more tumor cells.
PURPOSE: Phase I trial to study the effectiveness of intrahepatic and intravenous combination chemotherapy with or without cryosurgery in treating unresectable liver metastases from colorectal cancer.