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.

gallium Ga 68-edotreotide
A radioconjugate consisting of the octreotide derivative edotreotide labeled with gallium 68 (Ga-68) with potential application in somatostatin receptor (SSTR) imaging in conjunction with positron emission tomography (PET). Similar to octreotide, gallium Ga 68-edotreotide binds to SSTRs, especially type 2 receptors, present on the cell membranes of many types of neuroendocrine tumor cells and their metastases, thereby allowing for imaging of SSTR-expressing cells upon PET. Gallium Ga 68-edotreotide is produced by substituting tyrosine for phenylalanine at the 3 position of the somatostatin analogue octreotide (Tyr3-octreotide or TOC) and chelating the substituted octreotide to Ga-68 via the macrocyclic chelating agent dodecanetetraacetic acid (DOTA).

Ga-68 DOTA0-Tyr3-octreotide
gallium Ga 68-DOTATOC