PATIENT CHARACTERISTICS: Age: 18 and over Menopausal status: Not specified Performance status: Karnofsky 90-100% Life expectancy: Not specified Hematopoietic: Lymphocyte count at least 500/mm3 WBC at least 3,000/mm3 Hepatic: Alkaline phosphatase no greater than 1.5 times upper limit of normal (ULN) SGOT no greater than 1.5 times ULN Renal: Creatinine no greater than 1.5 times ULN Cardiovascular: No New York Heart Association class III or IV heart disease Other: No immunodeficiency or autoimmune disease No seafood allergies No other active malignancies except basal cell or squamous cell skin cancer Not pregnant Negative pregnancy test Fertile patients must use effective barrier contraception