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A radiolabeled divalent histamine-succinyl-glycine (HSG) hapten-peptide linked with the macrocyclic chelator 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) to the radionuclide indium (In) 111. After pretargeting with a bispecific monoclonal antibody (BiMoAB) directed against both a tumor associated antigen (TAA) and the HSG hapten-peptide, the HSG portion of administered indium-In-labeled di-HSG-DOTA peptide IMP-288 binds the anti-HSG portion of the BiMoAB; In-111 radioisotopic activity localized to tumor cells bearing the TAA can then be visualized scintigraphically. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C82356\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C82356\' NCI Thesaurus)
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