OUTLINE: This is a randomized, multicenter study. Patients are randomized to one of four doses of preoperative SCH 66336 (no treatment, 100 mg, 200 mg, or 300 mg). Patients receive oral SCH 66336 twice daily for 7-14 days prior to exploratory laparotomy and/or resection of hepatic metastases. Patients randomized to no treatment may undergo surgery at any time within 15 days of randomization. Other patients undergo surgery on days 8-15.