NCI Drug Dictionary

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The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

zirconium Zr 89 Df-IAB2M
A radioimmunoconjugate comprised of an antibody fragment (IAB2M) against prostate-specific membrane antigen (PSMA), conjugated to the chelator desferrioxamine (Df) and labeled with the radioisotope zirconium Zr 89, with potential positron emission tomography (PET) imaging activity. Upon administration of zirconium Zr 89 Df-IAB2M, the antibody moiety binds to the extracellular domain of PSMA expressed on cancer cells. This may enable PET detection of the radioisotope moiety, and allows the imaging and quantification of PSMA-expressing tumor cells. PSMA is a cell surface peptidase highly expressed by malignant prostate epithelial cells and vascular endothelial cells in various solid tumor malignancies. Check for active clinical trials using this agent. (NCI Thesaurus)