OUTLINE: This is an open label study. Amifostine is administered by 10 minute IV infusions. Irinotecan is administered by IV infusions 15 minutes after completion of amifostine. Treatment is repeated every 2 weeks for 6 weeks. This 6 week course is repeated in the absence of disease progression. Treatment may be delayed up to 2 weeks after a course to allow for recovery from toxic effects. Patients are followed at the end of study and at 30 days after study.