PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Karnofsky 70-100% ECOG 0-2 Life expectancy: At least 3 months Hematopoietic: WBC at least 3,000/mm3 Granulocyte count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than 2 mg/dL AST and alkaline phosphatase less than 1.5 times upper limit of normal (ULN) (except for bone involvement) Renal: Creatinine less than 1.5 times ULN Other: Not pregnant Fertile patients must use effective contraception during and for 3-6 months after study HIV negative No severe anorexia, nausea, or vomiting No other significant concurrent medical condition that would interfere with compliance