Iodide-induced hypothyroidism without a goiter in an infant with cystic fibrosis.

It has been suggested that patients with cystic fibrosis may have an 
intrinsic abnormality of thyroid function that may be enhanced by the 
administration of iodides. We wish to report an infant with CF 
in whom hyperthyroidism developed, in the absence of a goiter, following 
short-term iodide therapy. 