PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: At least 3 months Hematopoietic: ANC at least 1,500 Platelets at least 100,000 Hepatic: Bilirubin no greater than 1.5 mg/dL AST less than 3 times normal Renal: Creatinine no greater than 1.5 mg/dL Other: No contraindication to indwelling central venous catheter No active infection including HIV No other medical condition that would preclude protocol compliance No pregnant or nursing women Adequate contraception required of fertile patients