MEASUREMENT OF THYROID HORMONE IN EXPERIMENTAL THYROID TUMOURS IN RATS

in Journal of Endocrinology
Authors:
A. Y. AL-HINDAWI
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E. G. BLACK
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D. B. BREWER
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S. G. GRIFFITHS
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R. HOFFENBERG
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Rats treated with 131I and propylthiouracil were shown to develop thyroid tumours 7–9 months after treatment. In this group, the levels of total thyroxine and tri-iodothyronine, and free thyroxine and tri-iodothyronine in the serum were low, and that of TSH was raised. In a group of rats treated with 131I and then propylthiouracil and thyroxine, thyroid tumours were found despite normal concentrations of total and free thyroxine and tri-iodothyronine in the serum. The level of TSH in the serum was significantly raised in this group. Thyroid tumours were not found in the various control groups of rats.

 

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