PATIENT CHARACTERISTICS: Age: 18 to 75 Performance status: ECOG 0-2 Life expectancy: At least 4 months Hematopoietic: Absolute granulocyte count at least 1,500/mm3 Platelet count at least 75,000/mm3 Hemoglobin at least 8.0 g/dL Hepatic: Bilirubin no greater than 2.0 mg/dL Alkaline phosphatase no greater than 2 times upper limit of normal (ULN) SGOT no greater than 2 times ULN Renal: Creatinine clearance at least 65 mL/min Cardiovascular: See Disease Characteristics No pericardial effusion No New York Heart Association class III or IV heart disease No myocardial infarction within the past 6 months Other: No active, uncontrolled bacterial, viral, or fungal infection No active opportunistic infection No active inflammatory arthritis (excluding degenerative joint disease) No known hypersensitivity to interleukin-2 No history of an autoimmune disorder No history of seizure disorder No other primary malignancy in the past 5 years except squamous cell or basal cell carcinoma of the skin or carcinoma in situ of the cervix Not pregnant or nursing Fertile patients must use effective contraception