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  • Title: Iodine-123-Tyr-3-octreotide uptake in pancreatic endocrine tumors and in carcinoids in relation to hormonal inhibition by octreotide.
    Author: Nocaudie-Calzada M, Huglo D, Deveaux M, Carnaille B, Proye C, Marchandise X.
    Journal: J Nucl Med; 1994 Jan; 35(1):57-62. PubMed ID: 8271061.
    Abstract:
    UNLABELLED: Uptake of 123I-Tyr-3-octreotide (TOCT) by hormone-secreting abdominal tumors was studied to compare scintigraphic observations with the reduction in hormone levels brought about by a brief therapeutic test. METHODS: A prospective study was conducted on 17 patients, totalizing 46 proven lesions, with endocrine tumors of the pancreas (10 patients, 20 lesions) and/or carcinoid metastases (8 patients, 26 lesions). Tumor hormonal hypersecretion was inhibited by octreotide. RESULTS: There was good agreement between the results of these examinations. CONCLUSIONS: The detection of abdominal tumors using this radiotracer is strongly related to its functional characteristics. Variations in the scintigraphic and test results according to different tumor types were in agreement with published data on the density of somatostatin receptors measured by in vitro studies or scintigraphy and by the therapeutic effects of octreotide.
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