OUTLINE: This is a dose escalation study of iodine I 131 monoclonal antibody muJ591 (131I-J591). Patients receive unlabeled monoclonal antibody muJ591 IV over 1 hour followed by 131I-J591 IV over 1 hour. Cohorts of 3-6 patients receive escalating doses of 131I-J591 (radioactivity is escalated, monoclonal antibody dose is fixed) until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose at which 2 of 3 or 6 patients experience dose limiting toxicity. Patients are followed at weeks 3, 4, 6, 8, 9, and 12, and then every 6 months until month 21.