Congenital hypothyroidism caused by excess prenatal maternal iodine ingestion.

Connelly, Kara J; Boston, Bruce A; Pearce, Elizabeth N; Sesser, David; Snyder, David; Braverman, Lewis E; Pino, Sam; LaFranchi, Stephen H · J Pediatr · 2012

case_report · Level V

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Abstract

We report the cases of 3 infants with congenital hypothyroidism detected with the use of our newborn screening program, with evidence supporting excess maternal iodine ingestion (12.5 mg/d) as the etiology. Levels of whole blood iodine extracted from their newborn screening specimens were 10 times above mean control levels. Excess iodine ingestion from nutritional supplements is often unrecognized.

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