David A. van Tijn

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Due to the high frequency of concurrent pituitary hormone deficiencies, congenital hypothyroidism (CH) of central origin (CH-C) is a life-threatening disorder. Yet only a minority of these patients are detected by neonatal CH screening programs worldwide. We conducted a prospective multicenter study involving a 2-yr cohort of neonatally diagnosed CH-C(More)
Much worldwide attention is given to the adverse effects of maternal Graves' disease on the fetal and neonatal thyroid and its function. However, reports concerning the adverse effects of maternal Graves' disease on the pituitary function, illustrated by the development of central congenital hypothyroidism (CCH) in the offspring of these mothers, are(More)
CONTEXT Since the introduction of screening for congenital hypothyroidism (CH) in 1974, the optimal laboratory strategy has been the subject of debate. OBJECTIVE To assess the clinical effectiveness and cost-effectiveness of various types of thyroxine (T(4))-based strategies to screen for CH. DESIGN, SETTING, AND PARTICIPANTS In the Netherlands, since(More)
Animal studies have shown that dioxins influence plasma thyroid hormone concentrations. To investigate the effect of chlorinated dioxins and furans on thyroid hormone concentrations in humans, we studied 38 healthy breast-fed infants. The study population was divided into two groups according to the dioxin concentrations in milk fat of their mothers. Blood(More)
BACKGROUND During T(4) supplementation of patients with thyroidal (primary) congenital hypothyroidism (CH) TSH concentrations are frequently elevated despite free T(4) (FT(4)) concentrations being well within the reference range. To examine the thyroid's regulatory system, we analyzed thyroid function determinants in children with congenital and acquired(More)
CONTEXT A shortage of thyroid hormone during prenatal life and the first years after birth results in a spectrum of neuropsychological disorders, depending on the duration and severity of the deficiency. In the case of congenital hypothyroidism of central origin (CH-C), the majority of patients have multiple pituitary hormone deficiencies (MPHD). This(More)
CONTEXT Early recognition of gonadotropic dysfunction could enable well-timed growth and maturation and prevent damage to gonads and external genitalia. The adaptation of the Dutch neonatal screening program for congenital hypothyroidism in the mid 1990s resulted in enhanced detection of congenital hypothyroidism of central origin (CH-C), with high(More)
Chiari's network is a remnant of the eustachian valve located in the right atrium. Incomplete involution of the fetal sinus venosus valves results in "redundant" Chiari's network, which may compromise cardiovascular function. This report describes a case with the novel finding of prenatal compromise due to redundant Chiari's network and an uncommon case(More)
OBJECTIVE The dynamics of the plasma concentrations of various diagnostic determinants of thyroid function were analysed in children with congenital hypothyroidism (CH) after the start of T4 supplementation. The description of the biochemical dynamics of TSH and free T4 (FT4) during the first period of thyroxine treatment is important to depict the(More)