PATIENT CHARACTERISTICS: Age: 19 and over Performance status: Karnofsky 60-100% Life expectancy: At least 3 months Hematopoietic: Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin less than 1.5 times upper limit of normal (ULN) AST less than 5 times ULN Renal: Creatinine less than 1.5 times ULN No active obstructive hydronephrosis Cardiovascular: No New York Heart Association class III or IV heart disease Other: No active infection requiring IV antibiotics No other concurrent illness that would preclude evaluation No prior malignancy within the past 5 years except adequately treated skin cancer, carcinoma in situ of the cervix, or lymphoma HIV negative Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception during and for 6 months after study No prior allergic reaction to iodine other than IV iodine containing contrast materials Human antimouse antibody negative