NCIt definition : A condition associated with reduced export of iodide across the apical membrane of
the follicular cells of the thyroid gland that may progress to hypothyroidism. Pendred
syndrome is associated with an increased risk of goiter and sensorineural hearing
loss due to malformations of the inner ear (vestibular system). Inactivating mutations
in the SLC26A4 gene encoding the pendrin transport protein are responsible for the
condition.;