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  • A radiotracer consisting of sarcosine, the N-methyl derivative of the amino acid glycine, labeled with the positron-emitting isotope carbon C 11, that can be used for tumor imaging upon positron emission tomography/computed tomography (PET/CT). Upon administration, C-11 sarcosine is taken up by and accumulates in tumor cells, thereby allowing tumor imaging with PET/CT. Sarcosine, a non-proteinogenic amino acid and oncometabolite, is elevated in certain tumor cell types. Its expression seems to correlate with increased tumor invasiveness. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C122684\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C122684\' NCI Thesaurus)
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