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The purpose of this research study is to evaluate a new anti-cancer drug called S CKD602, developed by ALZA Corporation. The drug is investigational and not approved by the Food and Drug administration (FDA). The side effects (the way the drug acts in your body) and the effect it has on your disease will be studied.

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining more than one drug may kill more cancer cells. Chemoprotective drugs such as amifostine may protect normal cells from the side effects of chemotherapy.
PURPOSE: Phase II trial to study the effectiveness of combining topotecan and cytarabine given with amifostine in treating patients who have myelodysplastic syndrome.

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die.
PURPOSE: Phase I/II trial to study the effectiveness of amifostine plus irinotecan in treating patients with metastatic colorectal cancer.