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British Journal of Radiology (1981) 54, 626-629
© 1981 British Institute of Radiology
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The British Journal of Radiology, Vol 54, Issue 643 626-629, Copyright © 1981 by British Institute of Radiology

ARTICLES

The iodine concentration in benign and malignant thyroid nodules measured by X-ray fluorescence

TG Tadros, MN Maisey, SC Ng Tang Fui and PC Turner

Iodine concentration was measured by X-ray fluorescence in 48 normal thyroid glands obtained at autopsy and in 91 surgical thyroid specimens with a variety of abnormalities. The iodine concentration in normal thyroids ranged from 0.02 to 3.12 mg/g of tissue with a mean value of 1.03 +/- 0.67 mg/g. The concentrations in pathological specimens were generally lower with the lowest values found in thyroid cancers. Sixteen (76%) of 21 malignant thyroid specimens analysed had undetectable iodine (less than 0.02 mg/g) whereas 22 (96%) of 23 benign nodules had measurable iodine concentrations. The detection of iodine in a thyroid nodule by X-ray fluorescence pre-operatively would significantly decrease the probability of malignancy and the need for surgical excision.




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