PATIENT CHARACTERISTICS: Age: 18 and over Performance status: SWOG 0-1 Life expectancy: At least 3 months Hematopoietic: WBC at least 4,000/mm3 Platelet count within normal limits Hepatic: Bilirubin no greater than 2 times normal Renal: Creatinine no greater than 2.0 mg/dL Cardiovascular: Adequate cardiovascular system with NYHA Class 0 or I No uncontrolled cardiac arrhythmias Pulmonary: FEV1 at least 65% of predicted FVC at least 65% of predicted No asthma or bronchial obstruction that would prevent the delivery of IL-2 to all lobes of the lung Other: HIV negative No medical or psychological criteria that would make patient unable to tolerate the treatment Not pregnant or nursing Adequate contraception required of all fertile patients