PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Karnofsky 70-100% Life expectancy: At least 3 months Hematopoietic: Granulocyte count at least 2,500/mm3 Lymphocyte count greater than 700/mm3 Platelet count at least 100,000/mm3 Hepatic: ALT/AST no greater than 3 times upper limit of normal Bilirubin less than 2 mg/dL Renal: Creatinine no greater than 2.0 mg/dL Other: No pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No incomplete healing at an incision site as evidenced by incomplete granulation, infection, or localized edema No active infections requiring antibiotics No bleeding disorders No other serious illness that may potentially interfere with obtaining accurate study results No autoimmune disease No hypertrophic skin conditions