NEONATAL SCREENING FOR CONGENITAL HYPOTHYROIDISM IN ROMANIA: DATA FROM MEDILOG MEDICAL INFORMATION REGISTRY

IODINE STATUS IN ROMANIA AFTER 20 YEARS OF MANDATORY SALT IODIZATION: DISCORDANT RESULTS IN SCHOOLCHILDREN AND NEONATES

Objective

To monitor the iodine status in Romanian schoolchildren and neonates after 20 years of mandatory salt iodization.

Subjects and methods

In a national representative sample of 1352 children (7-12 years) we measured median urinary iodine concentration (mUIC) and creatinine (UCC) in spot urine samples and investigated household use of iodized salt. From 18349 neonates registered in the MEDILOG program for TSH screening we calculated the percentage of neonatal TSH >5 mIU/L (<3% indicating adequate iodine intake).

Results

mUIC in schoolchildren was 141 µg/L (bootstrapped 95% CI 134, 146), showing adequate iodine intake in all but 1 county; mUIC was similar in historical endemic and non-endemic counties (140 µg/L and 143 ug/L, respectively) and in urban and rural areas (140 µg/L and 142 µg/L, respectively); mUIC/UCC = 118 ug/g. Iodized salt was used in 62% of households. In children using iodized salt (61.7%), mUIC was higher than in those using coarse (non-iodized) salt (24.6%): 150 vs. 121 µg/L (p<0.001). The percentage of nTSH >5 mIU/L was 14.7% (3.2%-27.3%), higher in non-endemic counties and urban areas.

Conclusion

The current salt iodization program for households and bakery industry ensures an adequate iodine intake in schoolchildren. Discordantly, nTSH levels indicate a mild-moderate ID in neonates, suggesting ID in pregnant women. The percentage of households using iodized salt is below the recommended >90% needed for an efficient ID prevention program. More efforts should be directed to increase the public awareness on the health risks of ID and the benefits of ID prevention, notably for the neurointellectual development in children.

GUIDANCE TO THE MATERNAL, FETAL AND NEONATAL MANAGEMENT OF RESISTANCE GRAVE'S DISEASE IN PREGNANCY

Resistant Graves' disease in pregnancy is a rare entity. The clinical situation poses immense difficulty to the treating endocrinologist and obstetrician in optimizing maternal and fetal heath. No guidelines till date are available to manage resistant Grave's disease in pregnancy. We hereby present a case series on resistant Grave's in pregnancy and our institute experience in managing this rare and challenging clinical entity. Definitive management is total thyroidectomy in second trimester. Higher doses of ATDs and betablockers may have its fetopathic effects. Use of immunosuppressive agents are not advised in pregnancy to suppress the TRAb titre. Steroid therapy may be used as an adjuvant to permissible doses of anti-thyroid medications to curb the thyrotoxicosis in pregnancy. An alternate fetal friendly ATD is not available to add on to existing ATDs. TRAb estimation in maternal blood is mandatory. Mothers need frequent monitoring of cardiac status and need to avoid factors that can cause cardiac decompensation. Fetal surveillance includes growth monitoring and biophysical profile at nearby intervals, helps to ascertain the effects of excess thyroid hormones, TRAb and anti-thyroid drugs. Immediate neonatal cord blood screening for thyroid abnormalities is necessary. Maternal and fetal management in such a clinical situation is multidisciplinary.

Hyperthyroidism in Pregnancy: The Delicate Balance between Too Much or Too Little Antithyroid Drug

Overt hyperthyroidism (HT) during pregnancy is associated with a risk of maternal–fetal complications. Antithyroid drugs (ATD) have a potential risk for teratogenic effects and fetal–neonatal hypothyroidism. This study evaluated ATD treatment and thyroid function control during pregnancy, and pregnancy outcome in women with HT. Patients and methods: A retrospective analysis of 36 single fetus pregnancies in 29 consecutive women (median age 30.3 ± 4.7 years) with HT diagnosed before or during pregnancy; a control group of 39 healthy euthyroid pregnant women was used. Results: Twenty-six women had Graves’ disease (GD, 33 pregnancies), 1 had a hyperfunctioning autonomous nodule, and 2 had gestational transient thyrotoxicosis (GTT). Methimazole (MMI) was administered in 22 pregnancies (78.5%), Propylthiouracil (PTU) in 2 (7.1%), switch from MMI to PTU in 4 (14.2%), no treatment in 8 pregnancies (3 with subclinical HT, 5 euthyroid with previous GD remission before conception). In the 8 pregnancies of GD patients diagnosed during gestation or shortly before (<6 weeks), i.e., with fetal exposure to uncontrolled HT, there was 1 spontaneous abortion at 5 weeks (3.4% of all ATD-treated pregnancies), and 1 premature delivery at 32 weeks with neonatal death in 24 h (3.4%); 1 child had neonatal hyperthyroidism (3.3% of live children in GD women) and a small atrial sept defect (4% of live children in ATD treated women). In women treated more than 6 months until conception (20 pregnancies): (a) median ATD doses were lower than those in women diagnosed shortly before or during pregnancy; (b) ATD was withdrawn in 40% of pregnancies in trimester (T)1, all on MMI < 10 mg/day (relapse in 14.2%), and in up to 55% in T3; (c) TSH level was below normal in 37%, 35% and 22% of pregnancies in T1, T2 and T3 respectively; FT4 was increased in 5.8% (T1) and subnormal in 11.75% in T2 and T3; (d) no fetal birth defects were recorded; one fetal death due to a true umbilical cord knot was registered. Mean birth weight was similar in both ATD-treated and control groups. Hyperthyroidism relapsed postpartum in 83% of GD patients (at median 3 ± 2.6 months). Conclusion: In hyperthyroid women with long-term ATD treatment before conception, drugs could be withdrawn in T1 in 40% of them, the thyroid function control was better, and pregnancy and fetal complications were rarer, compared to women diagnosed during pregnancy. Frequent serum TSH and FT4 monitoring is needed to maintain optimal thyroid function during pregnancy.

First Experiences with Newborn Screening for Congenital Hypothyroidism in Ulaanbaatar, Mongolia

Congenital hypothyroidism (CH) is among the most common conditions leading to intellectual disability, which can be prevented by early detection through newborn screening (NBS). In Mongolia, a regional screening program for CH was launched in 2000, which was supported by the International Atomic Energy Agency (IAEA) for the Asia Pacific Region. In our present study, a total of 23,002 newborns from nine districts in Ulaanbaatar were screened between 2012 and 2020, by the measurement of the thyroid-stimulating hormone (TSH) from dried blood spots, sampled 24 to 72 h after birth. The level of TSH was measured by the DELFIA assay. The overall CH prevalence confirmed at birth was 1/2091. The female-to-male ratio for CH cases was 1.8:1. The majority of patients were asymptomatic (72.7% of CH cases); umbilical hernia and cold or mottled skin were reported symptoms in patients with CH (27.3%). Thyroid dysgenesis (hypoplasia and agenesis) was the most common etiology, with a total of nine cases (81.8%) out of the eleven patients. The lapse between the birth date and the initiation of L-thyroxine treatment in CH-positive children was lower than 15 days in 63.64% of cases or 15 to 30 days in 36.36% of children. Further research is required to expand the screening coverage for CH in Mongolia.

Recall Rate in Congenital Hypothyroidism Screening: Influence of the Day of Sample Collection and Lower Cutoff

INTRODUCTION

The recall rate in congenital hypothyroidism (CH) newborn screening programs depends on several factors such as primary screening strategy, sample collection guidelines, and cut-off. A recall rate of 0.05% is recommended but recall rates of 0.01-13% are reported worldwide.

OBJECTIVE

The aim of the study was to assess the recall rate in association with the age of the newborn at sample collection and with a lower cut-off.

DESIGN

This was a retrospective correlational study concerning TSH results in CH screening program.

SUBJECTS AND METHODS

All newborns from a tertiary center in Targu Mures, Romania between 2013-2018 were included. Four groups were created and a correlation test between TSH median value and age in days was performed. The recall rate was calculated using three cut-off levels for 8182 TSH results performed in 2018.

RESULTS

90% of the DBS were collected in days 3-5 after birth and 1/79 live births from this group had TSH above the lower cut-off used (10 mUI/L). 2% of the samples were collected in less than 48 hours after birth and 1/21 live birth from this group had TSH > 10 mUI/L. The recall rate in our center in 2018 was 0.08%, higher than the recommended rate of 0.05%. With the cut-off value recommended by the Health Ministry a 0.03% recall rate was obtained.

CONCLUSIONS

Sample collection in less than 48 hours increases the recall rate in CH screening with TSH primary testing strategy. A lower cut-off raises the recall rate with a higher rate of false-positive cases (94.12%) but with 100% negative predictive value.

Current Status of Newborn Screening in Southeastern Europe

Significant part of Southeastern Europe (with a population of 76 million) has newborn screening (NBS) programs non-harmonized with developed European countries. Initial survey was conducted in 2013/2014 among 11 countries from the region (Albania, Bulgaria, Bosnia and Herzegovina (BIH), Croatia, Kosovo, Macedonia, Moldova, Montenegro, Romania, Serbia, and Slovenia) to assess the main characteristics of their NBS programs and their future plans. Their cumulative population at that time was ~52,5 million. At that time, none of the countries had an expanded NBS program, while phenylketonuria screening was not introduced in four and congenital hypothyroidism in three of 11 countries. We repeated the survey in 2020 inviting the same 11 countries, adding Cyprus, Greece, Hungary, and Malta (due to their geographical position in the wider region). The aims were to assess the current state, to evaluate the change in the period, and to identify the main obstacles impacting the implementation of expanded NBS and/or reaching a wider population. Responses were collected from 12 countries (BIH-Federation of BIH, BIH-Republic of Srpska, Bulgaria, Croatia, Greece, Hungary, Kosovo, North Macedonia, Malta, Montenegro, Romania, Serbia, Slovenia) with a population of 68.5 million. The results of the survey showed that the regional situation regarding NBS only modestly improved in this period. All of the surveyed countries except Kosovo screened for at least congenital hypothyroidism, while phenylketonuria was not screened in four of 12 countries. Croatia and Slovenia implemented an expanded NBS program using tandem mass spectrometry from the time of last survey. In conclusion, the current status of NBS programs in Southeastern Europe is very variable and is still underdeveloped (or even non-existent) in some of the countries. We suggest establishing an international task-force to assist with implementation and harmonization of basic NBS services where needed.

Overview of the pediatric healthcare system in Romania

Until 1989, Romania was one of the countries of the communist bloc in Europe and its healthcare system was characterized by centralized planning and severe underfunding, with low performance and low quality healthcare. Since 1998, Romania replaced the Semashko model with a social health insurance system, highly centralized under the management of the Ministry of Health as the central administrative authority. After joining the European Union, quality of life increased in our country and there were efforts to improve the quality of healthcare, including pediatric and neonatal care. Still, Romania has the lowest share of health expenditure of gross domestic product among the European Union Member States and the lowest level of expenditure per inhabitant. The Romanian health system is organized on three levels of assistance: primary, secondary and tertiary assistance. This overview presents the organization and the characteristics of pediatric and neonatal healthcare in Romania at all levels, the infrastructure and the human resources, the educational system from medical school to pediatric residency, professional organizations, national health programs, and the child health status in Romania. Infant mortality, the most descriptive single indicator of the quality of a health system, decreased constantly for the last 30 years in Romania, but is still the highest in the European Union. Even though there were great improvements in the healthcare for children, more efforts should be made to assure a better quality of care for the future of our nation, both on the human resources (in great danger due to the brain-drain of medical professionals during the last 12 years), and on the infrastructure plan.

Screening of Congenital Hypothyroidism in North-East Romania. Benefits and Messages for Further Improvement

Background

If not diagnosed at birth, congenital hypothyroidism (CH) can cause deleterious, irreversible neurodevelopmental sequels. The importance of thyroid newborn screening (NBS) is therefore well established.

Objective

To evaluate the efficacy of NBS for CH in North-East Romania.

Methods

Retrospective, descriptive study involving 271662 newborns screened between 2010 and 2019 for CH and phenylketonuria in maternities from six Romanian North-Eastern counties by measuring neonatal TSH (neoTSH) in the whole blood extracted from the heel between days 3 and 5 after birth. Values found higher than a cut-off level of 10 mIU/L were followed by serum evaluation of TSH and fT4 for the confirmation of CH. Thyroid ultrasound was further performed at children found with CH.

Results

NeoTSH was found elevated in 417 newborns, but CH was subsequently confirmed in only 57 cases (1/4766 newborns). Mean age at the time when diagnosis was communicated was of 37.2 ± 15 days (between 9 and 157 days). Mean age when therapy was started was of 44.2 ± 17.9 days (between 13 and 160 days) with a mean delay of one week from diagnosis (between 0 and 62 days). Thyroid ultrasound revealed athyreosis in only 3 cases, atrophic thyroid gland in other 10 cases, whereas the thyroid was described as present in the remnant 44 cases. The number of first year follow-up visits greatly varied from 0 to 5, with an average of 2.

Conclusions

NBS allowed rapid diagnosis of CH in North East Romania. The communication of diagnosis to families and therapy onset were however often delayed. Diagnosis and therapy onset before the age of two weeks, as well as a tighter follow-up should be assured by the healthcare system. Etiological diagnosis should be more accurate, for a better prognosis of disease severity, as well as the possibility of genetic advice in selected cases.