PATIENT CHARACTERISTICS: Age: Over 18 Performance status: Karnofsky 60-100% Life expectancy: Not specified Hematopoietic: Absolute neutrophil count greater than 1500/mm3 Platelet count greater than 100,000/mm3 Hemoglobin greater than 9.5 g/dL Hepatic: Bilirubin less than 2 mg/dL AST and ALT less than 2 times upper limit of normal (ULN) PT/PTT no greater than ULN Renal: Creatinine less than 2 mg/dL Other: Not pregnant Negative pregnancy test Fertile patients must use effective contraception No systemic diseases to cause unacceptable anesthetic/operative risk No active infection requiring treatment No unexplained febrile illness