Gefitinib in Treating Patients With Recurrent Metastatic Colorectal Cancer

RATIONALE: Biological therapies such as gefitinib may interfere with the growth of the tumor cells and slow the growth of recurrent metastatic colorectal cancer. PURPOSE: Randomized phase II trial to compare the effectiveness of two different doses of gefitinib in treating patients who have recurrent metastatic colorectal cancer.