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A permanent thyroid hormone deficiency that is present from birth. The majority of cases are asymptomatic but some may have features of hypothyroidism including decreased activity and increased sleep, feeding difficulty and constipation, prolonged jaundice, myxedematous facies, large fontanelles (especially posterior), macroglossia, a distended abdomen with umbilical hernia, and hypotonia. In 90% of cases the peripheral resistance to thyroid hormones is caused by dominantly inherited mutations in genes encoding for thyroid hormone receptor beta.
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A permanent thyroid hormone deficiency that is present from birth. The majority of cases are asymptomatic but some may have features of hypothyroidism including decreased activity and increased sleep, feeding difficulty and constipation, prolonged jaundice, myxoedematous facies, large fontanelles (especially posterior), macroglossia, a distended abdomen with umbilical hernia, and hypotonia. In 90% of cases the peripheral resistance to thyroid hormones is caused by dominantly inherited mutations in genes encoding for thyroid hormone receptor beta.
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