OUTLINE: This is an open label, multicenter study. After all other diagnostic studies have been completed, patients receive an infusion of technetium Tc 99m LL2 monoclonal antibody by IV injection or infused over 20-30 minutes as part of their staging procedures. Planar images are acquired between 4-8 hours and 18-24 hours following antibody injection, and single photon emission computerized tomography (SPECT) imaging is performed between 4-8 hours following antibody injection. Patients may receive a repeat injection of technetium Tc 99m LL2 monoclonal antibody. Patients are followed for 3 to 6 months.