NCI Drug Dictionary

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.

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fluorine F 18-active site inhibited factor VIIa
A radioconjugate containing a tissue factor (TF) tracer, a derivative of activated factor VII (FVIIa), labeled with fluorine F 18, with potential use for TF-expressing tumor imaging using positron emission tomography (PET). Upon administration of fluorine F 18 active site inhibited factor VIIa (18F-ASIS), the active site inhibited factor VIIa (FVIIai) moiety selectively targets and binds, with a much higher binding affinity than FVIIa, to TF. Upon PET imaging, tumor cells expressing TF can be visualized and assessed. TF, a transmembrane glycoprotein, is overexpressed on certain tumor cell types and is correlated with tumor aggression and poor prognosis. Check for active clinical trials using this agent. (NCI Thesaurus)

Abbreviation:18F-ASIS