Patients receive intraperitoneal (IP) technetium Tc 99m sulfur colloid and undergo abdominal imaging on day 1. Provided distribution of technetium Tc 99m sulfur colloid is deemed adequate, patients then receive IP Y90 MOAB Hu3S193 and IP indium In 111 monoclonal antibody Hu3S193 (for imaging) over 30 minutes on day 1. Within 3-5 hours after antibody administration, patients undergo whole body imaging and single-photon emission-computed tomography (SPECT) imaging of the abdomen and pelvis.