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Congenital Hypothyroidism

July 2006

• Screening of newborn infants for hypothyroidism should be done twice

March 2004

• Mutations in a thyroid hormone–transport molecule cause neurologic and thyroid abnormalities
  
  
• Thyroid radioiodine imaging is superior to ultrasonography in determining the cause of congenital hypothyroidism
  
  
• Hypothyroidism can occur in infants of mothers with hyperthyroidism caused by Graves’ disease during pregnancy

March 2003

• Mutations in Pendred's syndrome result in abnormal localization of the gene product in thyroid cells

November 2002

• Monozygotic twins are rarely concordant for congenital hypothyroidism

July 2002

• Breast milk contains too little thyroid hormone to raise plasma thyroid hormone concentrations in preterm infants

March 2002

• School achievement is reduced in children with congenital hyperthyroidism if it is severe and treatment is inadequate

• Severe hypothyroidism and slow onset of adequate treatment are associated with learning and memory deficits in children with congenital hypothyroidism