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  • Title: Insensitivity of Tc-99m pertechnetate for detecting metastases of differentiated thyroid carcinoma.
    Author: Campbell CM, Khafagi FA.
    Journal: Clin Nucl Med; 1990 Jan; 15(1):1-4. PubMed ID: 2155079.
    Abstract:
    To evaluate the use of Tc-99m pertechnetate whole body scanning for the detection of metastases of differentiated thyroid carcinoma, the authors performed sequential Tc-99m pertechnetate and I-131 scans in five patients with known or suspected metastatic thyroid cancer. All five patients had abnormal I-131 uptake, but only two patients had abnormal Tc-99m pertechnetate uptake. A total of 33 abnormal foci were located with I-131; Tc-99m pertechnetate detected only 3 of these foci, and did not demonstrate any foci that were not apparent with I-131. Despite the theoretical advantages of Tc-99m pertechnetate, it cannot be recommended as a substitute for I-131 for locating thyroid cancer metastases.
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