A murine IgG monoclonal Fab fragment antibody labeled with technetium-99m directed against carcinoembryonic antigen (CEA), a protein that is overexpressed by many tumor cell types. For tumors that overexpress CEA, arcitumomab may be used as an adjunct diagnostic imaging tool to obtain prognostic information following resection and to monitor for recurrent disease. Check for active clinical trials using this agent. (NCI Thesaurus)

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