Hyperthyroidism In Children Research Articles

Pediatric Graves' Disease: Surgical Interventions in a Single Institution - A Comprehensive Case Series.

Graves' disease (GD) is the most common cause of hyperthyroidism in children and adolescents. Data regarding pediatric GD in Indonesia are limited and pose challenges to diagnosing and treating the patients. In many aspects the clinical presentation of GD in children and adolescents resembles that of the adult population. There are three treatments for pediatric GD: anti-thyroid drugs, radioiodine ablation, and thyroidectomy. Although surgery is gaining acceptance as the definitive first-line treatment for children with GD, several studies examining pediatric populations have shown high complication rates. This study aims to describe a series of pediatric GD cases from a tertiary care center over an eight-year period. Retrospective data of five patients with hyperthyroidism diagnosed with GD between 2014 and 2022 were reviewed. Clinical presentation, diagnosis, therapies, and short-term postoperative outcomes of GD were analyzed. All five GD patients presented with neck lumps. Low TSH levels and elevated FT4 levels were found in all patients preoperatively. Total thyroidectomy was performed in all patients, while one patient had lymphadenectomy concurrently. Histopathologic examination confirmed a diagnosis of GD in all patients. All patients in this study experienced postoperative complications such as hoarseness, while only three patients had hypocalcemia as a complication. Total thyroidectomy in pediatric patients remains challenging. The euthyroid condition in patient prior to surgery is recommended to avoid the risk of thyroid storm during surgery, but a few studies have revealed that there is no difference in outcomes for hyperthyroid individuals. Close postoperative surveillance for complications of total thyroidectomy is necessary. Results of this study showed that pediatric GD patients had the same symptoms of hyperthyroidism as adults with all patients complained of neck lumps. Total thyroidectomy is the definitive therapy for GD in pediatrics as well as in adults. The minority of patients will experience transient and benign morbidities, with hoarseness of the voice being the most common transient postoperative morbidity. In performing total thyroidectomy, meticulous surgery and good anatomical recognition are required to avoid postoperative complications. So that, follow-up of post-total thyroidectomy in pediatric GD patients needs to be done.

Approach to the Patient: Challenging Cases of Pediatric Thyrotoxicosis.

Graves' disease (GD) is the leading cause of hyperthyroidism in children. However, compared to adults GD in children is a rare condition. In a recent guideline issued by the European Thyroid Association the diagnostic evaluation and treatment of pediatric GD is described extensively. In this article we go beyond the guideline and describe the potential challenges of establishing the right etiology of thyrotoxicosis in children, illustrated by cases of thyroid hormone resistance, autonomous functioning thyroid nodules and subacute thyroiditis with a thyrotoxic phase. In addition, we report therapeutic challenges in pediatric GD such as recurrent immunological flare-ups under anti-thyroid drug (ATD) treatment, innovative ways to improve ATD compliance and the role of definitive treatment in persistent complaints of malaise under ATD treatment.

Resistant Graves’ Disease in Childhood, A Rare but Complicated Situation, through a Clinical Case

Graves’ disease is by far the most common cause of hyperthyroidism in children [1]. In this specific population, the hyperthyroidism is willingly biochemically overt and clinically severe [2]. Childhood hyperthyroidism may also cause accelerated growth and bone maturation, and eventually deterioration in academic performance, hence the need for a good screening and a better management. children with GD require prompt treatment, for the most of cases it’s initially medical. But once this fails or is not possible, a definitive treatment should be considered [3]. For the antithyroid drugs use, we currently consider no difference in biochemical control between DT and BR [2,4], unlike previous approaches which argue in favor of the use of bloc-replace method in children [5-6]. However, for a curative treatment, total thyroidectomy is the preferred option for GD patients younger than 10 years [3]. We report the case of a girl who was 2 and a half years old in the moment of diagnose, and whom we followed for Graves' disease for 1 and a half years. Ethical considerations: In accordance with the regulations in force, informed consent, written and verbal, was provided to the parents of the child before the publication of this work.

Hashitoxicosis in children: A case report

Hashitoxicosis is a medical condition characterized by hypermetabolism that is thought to be an uncommon cause of hyperthyroidism in children. This phenomenon is due to excessive release of thyroid hormones in a patient previously diagnosed with Hashimoto’s disease. Given the apparent rise in the number of patients with Hashimoto’s thyroiditis and/or improvements in diagnosis, this may be more frequent than previously believed. The case study we report is an 11-year-old patient who was diagnosed with hyperthyroidism caused by Graves’ disease based on clinical observations. Nevertheless, the initial investigations and the patient’s subsequent development suggest Hashimoto’s illness as the cause of the diagnosis

Functional enrichment analysis of mutated genes in children with hyperthyroidism.

Hyperthyroidism in Chinese children is relatively high and has been increasing in recent years, which has a significant impact on their healthy development. Hyperthyroidism is a polygenic disorder that presents greater challenges in terms of prediction and treatment than monogenic diseases. This study aims to elucidate the associated functions and gene sets of mutated genes in children with hyperthyroidism in terms of the gene ontology through GO enrichment analysis and in terms of biological signaling pathways through KEGG enrichment analysis, thereby enhancing our understanding of the expected effects of multiple mutated genes on hyperthyroidism in children. Whole-exome sequencing was performed on the DNA samples of children with hyperthyroidism. Screening for pathogenic genes related to hyperthyroidism in affected children was performed using the publicly available disease databases Malacards, MutationView, and Clinvar, and the functions and influences of the identified pathogenic genes were analyzed using statistical analysis and the gene enrichment approach. Through GO enrichment analysis, it was found that the most significant gene ontology enrichment was the function "hormone activity" in terms of gene ontology molecular function. The corresponding mutated genes set that has common effects on hyperthyroidism in children included TG, CALCA, POMC, CGA, PTH, GHRL, FBN1, TRH, PRL, LEP, ADIPOQ, INS, GH1. The second most significant gene ontology enrichment was the function "response to peptide hormone" in terms of biological process. The corresponding mutated genes set that has common effects on hyperthyroidism in children included LRP6, TSC2, KANK1, COL1A1, CDKN1B, POMC, STAT1, MEN1, APC, GHRL, TSHR, GJB2, FBN1, GPT, LEP, ADIPOQ, INS, GH1. Through KEGG enrichment analysis, it was found that the most significant biological signaling pathway enrichment was the pathway "Thyroid hormone signaling pathway" function. The corresponding mutated genes set that has common effects on hyperthyroidism in children included NOTCH3, MYH7, TSC2, STAT1, MED13L, MAP2K2, SLCO1C1, SLC16A2, and THRB. The second most significant biological signaling pathway enrichment was the pathway "Hypertrophic cardiomyopathy" in terms of biological process. The corresponding mutated genes set that has common effects on hyperthyroidism in children included IGF1, CACNA1S, MYH7, IL6, TTN, CACNB2, LAMA2, and DMD. The mutated genes in children with hyperthyroidism were closely linked to function involved in "hormone activity" and "response to peptide hormone" in terms of the biological signaling pathway, and to the functional pathways involved in "Thyroid hormone signaling pathway" and "Hypertrophic cardiomyopathy" in terms of the biological signaling pathway.

THU240 A Study Of 21 Cases Of Graves Disease In Childhood Presenting At Our Hospital For The First Time

Abstract Disclosure: T. Kashima: None. N. Ujita: None. H. Konno: None. A. Fujioka: None. H. Miyagi: None. M. Igarashi: None. H. Doi: None. K. Yoshii: None. Y. Naiki: None. R. Horikawa: None. M. Noordin: None. Although Graves disease is most common among women in their 20s and childhood-onset cases account for less than 5% of all cases of Graves disease, they account for the majority of hyperthyroidism in children. We report here a retrospective review of data on pediatric patients with Graves' disease who visited our hospital for the first time at the time of their initial examination. Methods We analyzed 21 pediatric patients with Graves disease who visited our hospital between November 2004 and January 2022. The electronic medical records of 21 patients were retrospectively reviewed for sex, age, height SD score, weight SD score, underlying disease, blood test results, and treatment initiation. Results There were 17 girls and 4 boys. The median age was 11 years and 5 months. Symptoms such as fever, feverishness, palpitations, weight loss, hyperactivity, and irritability were observed in 5 of the patients. Four patients had symptoms related to academic performance, such as low grades and poor concentration. Median physical findings were height SD score 0.62 (N=21), weight SD score 0.06 (N=21), and body mass index -4.4%. Two patients had bronchial asthma and atopic dermatitis, and one had myasthenia gravis and trisomy21 as underlying diseases. One patient was considered to have attention deficit hyperactivity disorder and was receiving antipsychotic medication. The median blood test values at the first visit were ALP 857 U/L (N=19), total cholesterol level 122 mg/dL (N=19), fT3 14.31 pg/mL (N=21), fT4 4.60 ng/dL (N=21), thyroid stimulating antibody 668 % (N=7), TSH receptor antibody 16.6 IU/L (N=20 TSH was less than sensitive in all cases. Nineteen patients received thiamazole. Fourteen patients received propranolol. Five patients received inorganic iodine. Five patients received inorganic iodine, starting at a median of 0.926 mg/kg/day of body weight. Discussion As with adults, females were more common. The symptoms were similar to those of attention deficit hyperactivity disorder, and thus warranted attention. Symptoms related to poor academic performance were also considered important. Anti-thyroglobulin antibodies and anti-TPO antibodies were also detected, suggesting that we should be careful about the possibility of the disease progressing to Hashimoto's disease. Presentation: Thursday, June 15, 2023

Childhood Grave’s-an experience from a tertiary care center

Background: Graves’ disease (GD) attributes for important cause for childhood hyperthyroidism with a prevalence of 0.02%. Initial treatment for GD is the use of antithyroid drugs (ATDs), which is well accepted. The remission rate is around about 30% of children treated with ATD. Aims and Objective: (1) To assess the predictors of relapse and remission after ATD in children with Grave’s disease. (2) To study the clinical profile at presentation and treatment outcome of children with Grave’s disease. Materials and Methods: We conducted a prospective cohort study of children diagnosed for GD (n=27) and treated with either carbimazole (0.6–0.8 mg/kg), methimazole (0.2–1 mg/kg), or (propylthiouracil, 5–10 mg/kg) and continued till euthyroid state was achieved. The dose was titrated every 2 months once till the achievement of the euthyroid state. Assessment of remission and relapse was done within a year of stopping the drug. Results: The overall estimated relapse rate for hyperthyroidism was 54.1% (13 patients), within a year of stopping ATD with a mean duration treatment of 24.23±7.44 months. Multivariate survival analysis showed that the risk of relapse (87.5%) was higher for patients of a body mass index SD score <0.5 and a large goiter. Pre-pubertal patients had higher relapse rate than pubertal patients (OR- 3.24, P=0.04). No other clinical variables such as age, gender, and Wayne Index were significantly associated with relapse, though patients in the relapse group were younger, and had a male predominance with higher Wayne index scores. Conclusion: GD in children has a high relapse rate. Severity of the disease as measured by various clinical methods is important in predicting relapse.

Thyroid Function: A Target for Endocrine Disruptors, Air Pollution and Radiofrequencies.

Thyroid diseases, including congenital hypothyroidism, thyroiditis, and childhood thyrotoxicosis, are progressively increasing. The incidence of thyroid cancer in children and adolescents has also increased in recent decades, mirroring the trends observed in adults. These epidemiologic trends develop in parallel with the rising costs associated with diagnosis and treatment of thyroid diseases. Both genetic and environmental factors are involved in these diseases, and a number of widely diffused toxic chemicals of anthropogenic origin can impair thyroid function and make thyroid cancer worse. Synthetic substances persistently contaminate environmental matrices (i.e., air, soil, water) and the food chain and bio-accumulate in humans, starting from in utero life. Environmental toxins such as air pollutants, endocrine disruptors, and high-frequency electromagnetic fields can act on common targets through common pathways, combined mechanisms, and with trans-generational effects, all of which contribute to thyroid damage. Both experimental and epidemiologic observations show that mechanisms of damage include: modulation of synthesis; transportation and metabolism of thyroid hormones; direct interference with hormone receptors: modulation of gene expression; and autoimmunity. We should not underestimate the available evidence linking environmental pollutants with thyroid disease, cancer included, since toxic substances increasingly diffuse and thyroid hormones play a key role in maintaining systemic metabolic homeostasis during body development. Thus, primary prevention measures are urgently needed in particular to protect children, the most exposed and vulnerable subjects.

Endothelial dysfunction in children with newly diagnosed Graves’ disease

The most frequent cause of hyperthyroidism in children is Graves’ disease (GD). Vascular endothelium is a specific target of thyroid hormone. The purpose of this study is to assess flow-mediated dilatation (FMD)% and serum von Willebrand factor (vWF) levels in children with newly diagnosed GD to reflect the extent of endothelial dysfunction in those children. In this study, 40 children with newly discovered GD and 40 children who were healthy served as the control group. Both patients and controls had anthropometric assessment, as well as measurements of fasting lipids, glucose, insulin, high-sensitivity C-reactive protein (hs-CRP), TSH, and free thyroxine (FT4 and FT3), thyrotropin receptor antibodies TRAbs and vWF. Noninvasive ultrasound was utilized to quantify the carotid arteries’ intima-media thickness and the brachial artery’s FMD. Patients reported significantly reduced FMD response and greater vWF and hs-CRP levels compared to controls (P = 0.001 for each). In multivariate analysis, we reported that vWF was significantly correlated with TSH (OR 2.5, 95% CI 1.32–5.32, P = 0.001), FT3 (OR 3.4, 95% CI 1.45–3.55, P = 0.001), TRAb (OR 2.1, 95% CI 1.16–2.23, P = 0.01), and FMD% (OR 4.2, 95% CI 1.18–8.23, P = 0.001). Conclusions: Children with newly diagnosed GD have endothelial dysfunction, which is shown by impaired FMD and increased vWF. These findings support the idea that GD may need to be treated as soon as possible.What is Known:• Graves' disease is the most common cause of hyperthyroidism in children.• vWF is a reliable marker for detection of vascular endothelial dysfunction.What is New:• Children with newly diagnosed Graves' disease may have endothelial dysfunction as reflected by impairment of FMD and raised vWF level.• Measurement of vWF level in children with newly diagnosed Graves' disease can be used for early detection of endothelial dysfunction.

Grave’s disease in a case of Goldenhar syndrome

Goldenhar syndrome (GS) is a malformation complex that involves structures arising from the first and second branchial arches. Graves’ disease is an autoimmune disorder resulting in the excessive production of thyroid hormones and is the most common cause of hyperthyroidism in children. We are reporting this case since the clinical association of Graves’ disease in GS has never been reported before and is a rare association of the syndrome. An 11-year-old developmentally normal child presented to us with swelling in front of her neck for the past 6 months associated with loss of weight, increased appetite, increased frequency of defecation, and palpitations. On examination, there was diffuse swelling in the thyroid region that moved with deglutition and did not move with protrusion of the tongue. The child also had an asymmetrical face with bilateral conjunctival dermoid and bilateral preauricular skin tag and pretragal sinus tract on the left side. Hence, a provisional diagnosis of goitre with features of hyperthyroidism in a child with first and second branchial arch syndrome was considered. Technetium 99 scan confirmed diagnosis of Graves’ disease. The child was started on carbimazole and propranolol and gradual improvement in symptoms noted. Propranolol was given for 3 months until symptoms such as palpitations and anxiety subsided and then stopped. Carbimazole was continued.

Health-related Quality of Life in Children and Adolescents with Graves’ Disease

Background: Graves’ disease is the most common cause of hyperthyroidism in children. In adults, it influences physical and mental health as well as health-related quality of life (QoL) of the patients. However, study of QoL in children has been limited. Objective: To measure QoL in children with Graves’ disease by means of the PedsQL™ and EQ-5D-Y by using Thai version questionnaires. Materials and Methods: A cross-sectional descriptive study examined 21 Graves’ disease patients with the mean age 13.6 ± 3.1 years. All of the participants and their care givers reported the PedsQL™ questionnaires and 20 participants older than eight years completed the EQ-5D-Y questionnaires. Results: The total mean QoL scores by child- and parent-report PedsQL™ questionnaires were 85.4±17.8 and 82.1±16.3, respectively. Both reported the lowest scores in the emotional functioning domain. The scores by child and parent reports were not different except in the school domain, in which parents reported lower scores. For the EQ-5D-Y questionnaires, 40% of the children reported problems in the domain of having pain or discomfort and 40% reported problems in the domain of feeling worried, sad, or unhappy. Mean (±SD) EQ-5D visual analogue scale value was 86.5±12.0. Conclusion: Children and adolescents with Graves’ disease reported their lowest QoL life scores in the domain of emotional functioning, followed by the physical functioning domains. However, the total QoL score was not lower than the total QoL scores in the previous studies of general healthy populations. Keywords: Health-related quality of life; Quality of life; Children, Graves’ disease

Современный взгляд на ведение диффузного токсического зоба в детском возрасте

Hyperthyroidism is a pathological condition characterized by over production of thyroid hormones (thyroxine (T4) and triiodothyronine (T3)) by the thyroid gland. The most often cause of hyperthyroidism in children is a diffuse toxic goiter (GD) with typical laboratory changes in blood and severe clinical duration. Signs and symptoms of hyperthyroidism in children are similar with adults, but in children we can find accelerated growth rates, increased fatigue and decreased academic performance. The article presents up-to-date data on the management of pediatric patients with GD with references to the 2022 clinical guidelines of the European Thyroid Association for the management of Graves' disease in children. Key words: hyperthyroidism, childhood , diffuse toxic goiter, thyroid gland

Graves' Disease in Children: An Update.

Graves' disease (GD) is the most common cause of hyperthyroidism in children. A common GD symptom is a goiter. The usual biochemical profile in children with GD is a decreased thyroid hormone stimulating hormone (TSH) level and high free thyroxine (FT4) and free triiodothyronine (FT3) concentrations. The presence of thyroid receptor antibodies (TRAb) is the most important specific immunological sign for diagnosing GD. The treatment choices for pediatric GD are anti-thyroid drugs (ATDs), radioiodine, and thyroidectomy, but the risks and benefits of each modality are different. Management recommendations include the first-line use of a prolonged course of ATDs for at least 3 years and potentially 5 years or more. Rituximab and Teprotumumab are new novel alternative medications for the treatment of adult patients with GD and Graves' orbitopathy respectively, but evidence of the efficacy and safety of these drugs in pediatric patients with GD is lacking.

Subclinical hyperthyroidism in children.

Subclinical hyperthyroidism (SH) is defined as serum thyroid-stimulating hormone (TSH) below the lower limit of the reference range in the presence ofnormal free T4 and free T3 levels. Depending on the degree of TSH suppression, SH could be defined as mild (TSH, 0.1-0.45mU/L) or severe (TSH<0.1mU/L). Patients with SH are often asymptomatic when symptoms are present, they are similar to the symptoms in patients with overt hyperthyroidism, although they are usually milder. The management of the SH is uncertain and should be individualized. We present this review after an extensive literature search and long-standing clinical experience. This review provides the prevalence, causes, clinical presentation, investigation, and therapeutic approach ofSH in children.

The effect of hyperthyroidism at thyroidectomy on complication rates in children with Graves' disease.

Graves' disease (GD) is the most common cause of childhood hyperthyroidism. Surgery is often chosen as a treatment modality given the high relapse rates and side effects of antithyroid drugs and has shown to be safe and efficacious. The goal of our study was to evaluate whether hyperthyroidism at time of thyroidectomy is associated with higher intra and postoperative complication rates. A retrospective cohort study of children who underwent thyroidectomy for GD by high-volume pediatric otolaryngologists between 2014 and 2021. 64 patients met inclusion criteria. Patients with hyperthyroidism (defined as free T4≥1.63ng/dL) were more likely to be treated with beta-blocker preoperatively compared to the euthyroid group (20/24 patients (83%) vs 23/40 patients (58%) respectively, p=0.035). Twenty (83%) patients with hyperthyroidism and 39 euthyroid patients (98%) were treated with methimazole prior to surgery. Intraoperative tachycardia was noted in 5% of euthyroid patients and 20.8% of patients with hyperthyroidism. The mean peak heart rate intra-operatively and the number of patients with heart rate ≥120bmp were significantly higher for patients with hyperthyroidism (96.5±16.2 vs 87.6±22.1bpm, p=0.02). Two patients required administration of esmolol during surgery for heart rate control, both with hyperthyroidism. Intra-operative peak systolic blood pressure, operative time, estimated blood loss, persistent hypocalcemia, length of admission and recurrent laryngeal nerve paralysis rates were similar among groups. Hyperthyroidism at surgery is associated with increased heart rate intraoperatively, with no increased risk for other complications. While optimizing thyroid hormone levels before surgery should be pursued in all children, our data suggest that hyperthyroidism should not delay the surgery.

ODP574 Characteristics of Grave's Disease Among Children and Adolescents in KSA

Abstract Background Graves’ disease (GD) is an autoimmune thyroid condition that causes hyperthyroidism in children and adolescents through stimulation by thyroid receptor antibodies. Objective The aim of this study is to determine the characteristics of Graves’ disease in children and adolescents in Medina, the Kingdom of Saudi Arabia, with comparison to those seen in other countries. Methods This is a retrospective chart review of children and adolescents diagnosed with Graves’ disease between January 2010 and May 2021. Results Fifty-eight patients aged 12. 02 ± 4.85 years were identified, of which 44 (75.9%) were females. Exophthalmos (63.8%), neck swelling (60.3%), palpitation (46.6%), and tremors (29.3%) were the most common presenting manifestations. Vitiligo and alopecia were the only autoimmune diseases seen in our patients with (1.72%) each. One (1.72%) patient was treated with radioactive iodine, 54 (93.1%) received carbimazole, and 6 (10.3%) underwent thyroidectomy. Conclusion In our study we found that Graves’ disease is more common in females. Neck swelling, palpitation, and tremor were the main manifestations. Compared with other countries, there was a higher frequency of exophthalmos and lower frequencies of associated autoimmune conditions. The primary treatment was antithyroid medication, whereas thyroidectomy and radioiodine were used less frequently. Presentation: No date and time listed

Spatiotemporal variation of childhood hyperthyroidism: a 10-year nationwide study.

Childhood hyperthyroidism is mostly caused by Graves' disease, a rare autoimmune disease in children. Epidemiological data are scarce and the variability of within-region incidence is unknown. We aimed to provide the first description of temporal trends in pediatric hyperthyroidism in France and to explore spatial trends, with a view to identifying possible environmental triggers. We performed an observational population-based study on data collected from the National Health Data System, covering the 2008-2017 period and the whole of France. We identified patients with an indicator reflecting incident cases of treated hyperthyroidism, in children aged 6 months-17.9 years, localized at the scale of the département (equivalent to a county) of residence. We performed descriptive analyses of incidence rate by sex, age, and year, and used a spatiotemporal model for estimation at département level. We identified 4734 incident cases: 3787 girls (80%) and 947 boys (20%). The crude incidence rate was 3.35 (95% CI: 3.26; 3.45) per 100 000 person-years over the study period. We estimated the increase in incidence between 2008 and 2017 at 30.1% (19.0%; 42.3%). Annual incidence rate increased linearly over the 10-year period in both girls and boys, rising similarly in all age groups and in all départements. The spatial model highlighted marked heterogeneity in the risk of childhood hyperthyroidism across France. The trend toward increasing incidence observed may reflect changes in genetic and environmental interactions, and the marked spatial heterogeneity may reflect localized ethnic or environmental factors worthy of further investigation.

CLINICAL FEATURES AND FOLLOW-UP RESULTS OF CHILDREN WITH HYPERTHROIDISM

ABSTRACT&#x0D; CLINICAL FEATURES AND FOLLOW-UP RESULTS OF CHILDREN WITH HYPERTHROIDISM&#x0D; Objective:&#x0D; Hyperthyroidism is a rare clinical condition in childhood that can cause serious problems. Information on the epidemiological features, follow-up and treatment of pediatric patients with hyperthyroidism is quite limited. In this study, clinical and laboratory findings and follow-up results of children with hyperthyroidism are presented.&#x0D; Materials and Methods:&#x0D; The data of children with hyperthyroidism between 2005-2022 at Atatürk University and Erzurum Health Sciences University Pediatric Endocrinology clinics were retrospectively analyzed.&#x0D; Results:&#x0D; 43 (81.1%) female and 10 (18.9%) male patients aged 2-18 years (14.05±3.0) were included in the study. Graves' disease (GD) in 36 (67.9%) patients, Hashimoto's thyroiditis (HT) in 14 (26.4%) patients, subacute thyroiditis in 2 (3.8%) and hyperactive thyroid nodules in 1 (1.9%) were detected. The most common symptoms were palpitations (75.5%), sweating (60.4%), tremors in the hands (49.1%), heat intolerance (45.3%) and weight loss (32.1%). Mean SD values of height, body weight and body mass index at the time of diagnosis were -0.05±1.16, -0.67±1.20 and -0.77±1.25, respectively. Goiter and exophthalmos were present in 69.8% and 30.2% of the cases, respectively. At the time of diagnosis, mean serum thyroid stimulating hormone (TSH), free tri-iodothyronine, free tetra-iodothyronine, thyroglobulin, anti-thyroid peroxidase, anti-thyroglobulin and TSH receptor antibody levels were 0.03±0.09 mIU/L, 13.0.34±7.07 pg/ml, 3.30±1.70 ng/dl, 101.93±180.35 ng/ml, 600.30±858.58 IU/ml, 322.82±644.08 IU/ml, and 12.41 ±14.37 IU/L, respectively. While 42 (79.2%) patients were treated with propranolol and methimazole, 3 (5.7%) patients with propranolol and propylthiouracil, and 4 (7.5%) patients with propranolol, 4 (7.5%) patients were not treated. The mean duration of treatment was 14.67±17.51 months. The mean time to euthyroid after starting antithyroid drug (ATD) was 24.80±14.33 days. While no serious drug-related side effects were detected in any patient, urticaria rash developed in 1 (1.9%) patient in the 1st month of treatment. Total thyroidectomy was performed in 3 cases with GD and 1 case with hyperactive thyroid nodules. Radioactive iodine treatment was not given to any of the cases. The remission rate in patients with GD was 46.7% at the early stage of treatment and 16.7% during the whole follow-up. The recurrence rate was 71.4%. At the last visit, 15 (28.3%) patients were euthyroid, 1 (1.9%) hyperthyroid, and 5 (9.4%) hypothyroid. While 21 (39.6%) of the cases were still using antithyroid medication, 11 (20.8%) were excluded from follow-up.&#x0D; Conclusion:&#x0D; The first and second most common causes of hyperthyroidism in children and adolescents are GH and HT, respectively. TRAb positivity, thyroid scintigraphy findings and clinical follow-up can distinguish between GH and HT. ATD therapy is effective and safe in keeping GH in remission.&#x0D; Key Words: Hyperthyroidism, Graves' disease, Hashimoto thyroiditis, Hashitoxicosis, Thyrotoxicosis

Hyperthyroidism in children and adolescents: Experience in a university hospital in Colombia

ResumenIntroducción. El hipertiroidismo es una condición heterogénea caracterizada por la producción excesiva de hormonas tiroideas. Su aparición en la edad pediátrica representa un reto diagnóstico y terapéutico.Objetivo. Describir las características clínicas y paraclínicas, así como la evolución y las diferencias entre las principales causas etiológicas de los pacientes con hipertiroidismo atendidos por el Servicio de Endocrinología Pediátrica del Hospital Universitario San Vicente Fundación en Medellín, Colombia, entre el 1° de julio de 2015 y el 30 de junio de 2020.Materiales y métodos. Se hizo un estudio observacional transversal con recolección retrospectiva de la información.Resultados. Se incluyeron 54 pacientes con una edad media de 11,9 años, 72,2 % de ellos mujeres. El 11,1 % tenía antecedentes familiares de enfermedad de Graves y 29,6 % de otras enfermedades tiroideas. El bocio fue la manifestación clínica más frecuente (83,3 %). El 92,6 % había recibido terapia con metimazol, el 79,6 % requirió betabloqueador y el 11,2 % necesitó una terapia farmacológica adicional. Se presentaron reacciones adversas a la medicación en el 16,7 %. En el 20,4 % de los pacientes hubo resolución del hipertiroidismo (espontánea: 9,3 %; posterior a la ablación con yodo radiactivo: 9,3 %, y después de la cirugía: 1,9 %).Conclusión. El hipertiroidismo es una enfermedad con manifestaciones clínicas diversas. La causa más frecuente es la enfermedad de Graves, seguida por la hashitoxicosis. En este estudio, la hashitoxicosis fue más frecuente que en estudios previos. La duración y los efectos secundarios del tratamiento farmacológico fueron similares a los reportados previamente, pero es de resaltar la mayor frecuencia de agranulocitosis en nuestra población.

Influence of the mother's history during pregnancy on the development of hyperthyroidism in children living in conditions of iodine deficiency

Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | ISSN 1479-6848 (online)