title: [Sporadic primary hypothyroidism in children yesterday and today].
abstract: The evolution of congenital primary hypothyroidism has extremely capitalized on early L-T4 substitutive therapy, as a result of neonatal screening techniques, that allow early diagnosis. However, IQ and neurodevelopment of patients diagnosed and treated in this manner are yet quite different from those normal controls. Latest efforts to achieve precocious neonatal diagnosis have led to earlier initiation of treatments. These circumstances, in addition to the use of higher L-T4 doses (between 10 and 15 micrograms/Kg/day) have permitted to improve clinical responses, in terms of QI and neurodevelopment. Still concern remains about the potential late side effects of high L-T4 doses, that could promote conduct and behavior alterations in these patients in the coming years; in this regard, some suspicions have been shown.
authors.forename: E
authors.initials: E
authors.lastname: Casado de Frías
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003409:Congenital Hypothyroidism; D006801:Humans; D007037:Hypothyroidism / Q000175:diagnosis; D007361:Intelligence Tests