Premium
Complete iodide trapping defect in two cases with congenital hypothyroidism: adaptation of thyroid to huge iodide supplementation
Author(s) -
LEGER F. A.,
DOUMITH R.,
COURPOTIN C.,
HELAL O. B.,
DAVOUS N.,
AURENGO A.,
SAVOIE J. C.
Publication year - 1987
Publication title -
european journal of clinical investigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.164
H-Index - 107
eISSN - 1365-2362
pISSN - 0014-2972
DOI - 10.1111/j.1365-2362.1987.tb01244.x
Subject(s) - iodide , thyroid , iodine , medicine , endocrinology , congenital hypothyroidism , stomach , chemistry , inorganic chemistry , organic chemistry
. Two cases of congenital defect in iodide trapping mechanism are related. The absence of thyroid and gastric concentration of 99m TcO4 led to the diagnosis. The study of saliva and gastric: serum concentration ratios confirmed the complete defect. The kinetics of radioiodine studied by external detection showed an early simultaneous decay in the thyroid, the stomach and the left ventricle. Thyroid accumulation of 131 I, demonstrated by camera imaging, was estimated to be 0·1% at 48 h. It probably originated from simple diffusion. Iodide supplementation was progressively increased to 4·5 g and 10 g day ‐1 respectively. It resulted in a normalization of all parameters. Huge doses of iodide did not result in any evidence of hyperthyroidism as TSH rose normally after TRH. Intermittent iodide supplementation in one case could not maintain euthyroidism longer than a few weeks. Daily treatment, therefore, seems necessary.