T3Thyrotoxicosis Due to Metastatic Thyroid Carcinoma
- 1 February 1973
- journal article
- other
- Published by The Endocrine Society in Journal of Clinical Endocrinology & Metabolism
- Vol. 36 (2) , 215-217
- https://doi.org/10.1210/jcem-36-2-215
Abstract
An unusual case of T3 thyrotoxicosis clue to metastatic follicular carcinoma of the thyroid is presented. The primary tumor and normal thyroid tissue were ablated previously by thyroidectomy and large therapeutic doses of 131I iodide. Subsequent tracer studies showed no uptake of 131I in the neck. Serum levels of total and free thyroxine were normal, and the serum T3 concentration was abnormally high at a time when no normal thyroid tissue remained and exogenous T3 had been discontinued. Therefore, the thyrotoxicosis in this patient was most likely due to overproduction of T3 by the metastatic tumor.Keywords
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