Portal Vein Embolization in Treating Patients With Liver Metastases From Primary Colorectal Cancer

RATIONALE: Embolization blocks blood flow to part of an organ and/or tumor. Blocking the portal vein on one side of the liver may cause the opposite side of the liver to increase in size and decrease the risk of liver failure following surgery.
PURPOSE: Phase II trial to study the effectiveness of portal vein embolization in treating patients who have liver metastases from primary colorectal cancer.