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Abstract
Thyroid diseases in children and adolescents include acquired or congenital conditions, including genetic disorders either isolated or part of a syndrome. Briefly, we will review the physiology and pathophysiology of the thyroid gland and its disorders. The aim of this chapter is to describe genetic abnormalities of the thyroid gland.
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Subacute Thyroiditis Presenting as Idiopathic Intracranial Hypertension. Case Rep Endocrinol 2021; 2021:9203319. [PMID: 34966564 PMCID: PMC8712176 DOI: 10.1155/2021/9203319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 11/18/2022] Open
Abstract
Background Several case reports have illustrated a rare neurological manifestation, idiopathic intracranial hypertension (IIH), in patients with thyrotoxicosis. However, none were diagnosed with thyroiditis. We report the case of a patient with subacute thyroiditis who presented with severe intractable headache due to IIH. Case Presentation. A 36-year-old woman visited Lampang Hospital in February 2021 complaining of neck pain and progressive severe intractable headache. Her vital signs and neurological examination were normal. Thyroid examination revealed a single 1 cm right thyroid nodule. A computed tomography (CT) scan of her brain illustrated diffuse brain edema. However, CT angiography and venography of the brain did not show abnormalities. The opening pressure of the cerebrospinal fluid was elevated (27 cmH2O). The free triiodothyronine level was 6.19 pg/mL, free thyroxine was 2.32 ng/dL, and thyroid-stimulating hormone was 0.0083 μIU/mL. Anti-Tg was positive at a low titer, but anti-TPO was negative. TRAb was also negative. Methimazole and acetazolamide were prescribed and monitored. The symptoms resolved completely within 2 weeks of onset. Thyroid hormones had returned to normal by 8 weeks. Conclusion This is the first case report of subacute thyroiditis presenting with IIH.
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Filipchuk M, Gassmann J, Castro Zamparella T, Tibaldo MC, Carpinella M, Sesto Tagliavini P, Scarnato P, Goicochea MT, Bruera O, Conci Magris DM, Lisicki M. High rates of (treated) hypothyroidism among chronic migraine patients consulting a specialized headache clinic: are we missing something? Neurol Sci 2021; 43:1249-1254. [PMID: 34283344 DOI: 10.1007/s10072-021-05424-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 06/21/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Roughly three percent of episodic migraine patients evolve into the most burdensome chronic form of this condition every year. While some of the determinants behind this transformation are well established, others are still ill defined. Hypothyroidism is a prevalent endocrinological disorder that can both produce a secondary headache or aggravate a pre-existing primary headache disorder such as migraine. OBJECTIVE We aimed to re-assess the association between hypothyroidism and chronic migraine controlling for factors such as hormone replacement treatment status and bodyweight. METHODS We retrospectively analyzed the medical records of episodic and chronic migraine patients who consecutively consulted our headache clinic in order to determine the prevalence of adequately treated hypothyroidism in each group. Only patients receiving a stable dose regimen were included. The body mass index and other possibly confounding covariates were also collected. RESULTS Data from 111 migraine patients was included for analysis. Most (88.6%) of chronic migraine sufferers were overusing acute medication. Treated hypothyroidism was significantly more prevalent in chronic migraine patients (29.55%) compared to episodic migraine patients (8.96%). This association was independent of the patients' body mass index or other variables. CONCLUSION Alterations of neuronal metabolism, deficient calcitonin release, or focal inflammation causing local hormonal deactivation might explain why hypothyroidism, in spite of levothyroxine replacement therapy, is associated with migraine chronification. Further studies evaluating these factors are warranted.
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Affiliation(s)
- Marcelo Filipchuk
- Headache Department, Neuroscience Unit, Conci-Carpinella Institute, Santa Rosa 994, Córdoba, Argentina
| | - Jesica Gassmann
- Headache Department, Neuroscience Unit, Conci-Carpinella Institute, Santa Rosa 994, Córdoba, Argentina
| | - Tatiana Castro Zamparella
- Headache Department, Neuroscience Unit, Conci-Carpinella Institute, Santa Rosa 994, Córdoba, Argentina.,Institute of Psychological Investigations, National University of Córdoba, Córdoba, Argentina
| | | | - Mariela Carpinella
- Headache Department, Neuroscience Unit, Conci-Carpinella Institute, Santa Rosa 994, Córdoba, Argentina
| | - Pablo Sesto Tagliavini
- Headache Department, Neuroscience Unit, Conci-Carpinella Institute, Santa Rosa 994, Córdoba, Argentina
| | - Pablo Scarnato
- Headache Department, Neuroscience Unit, Conci-Carpinella Institute, Santa Rosa 994, Córdoba, Argentina
| | - Maria Teresa Goicochea
- Servicio de Dolor, Departamento de Neurología, Sección Cefaleas, Fleni, Buenos Aires, Argentina
| | - Osvaldo Bruera
- Headache Department, Buenos Aires Institute of Neuroscience (INEBA), Buenos Aires, Argentina.,Headache and Facial Pain Department, Favaloro Foundation University Hospital, Buenos Aires, Argentina
| | - Diego Martin Conci Magris
- Headache Department, Neuroscience Unit, Conci-Carpinella Institute, Santa Rosa 994, Córdoba, Argentina
| | - Marco Lisicki
- Headache Department, Neuroscience Unit, Conci-Carpinella Institute, Santa Rosa 994, Córdoba, Argentina.
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Bauer AJ, Wassner AJ. Thyroid hormone therapy in congenital hypothyroidism and pediatric hypothyroidism. Endocrine 2019; 66:51-62. [PMID: 31350727 DOI: 10.1007/s12020-019-02024-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 07/17/2019] [Indexed: 12/11/2022]
Abstract
The evaluation and management of hypothyroidism in children are similar to adults, but there are important differences based on the dependence on normal thyroid function for neurocognitive and physical development. In the pediatric population, hypothyroidism is frequently categorized as congenital or acquired hypothyroidism, depending on the age of presentation and the underlying etiology. The evaluation and management of children and adolescents with hypothyroidism are determined by the etiology as well as by the age at diagnosis, severity of the hypothyroidism, and the response to thyroid hormone replacement therapy. Children and adolescents require higher weight-based doses for thyroid hormone replacement than do adults, likely due to a shorter half-life of thyroxine (T4) and triiodothyronine (T3) in children, but weight-based dose requirements decrease as the child advances into adulthood. Multiple gaps in knowledge remains regarding how to optimize the treatment of hypothyroidism in pediatric patients, including (but not limited to) the selection of patients with subclinical hypothyroidism for treatment, and the potential benefit of combined LT3/LT4 therapy for patients with persistent symptoms and/or low T3 on LT4 monotherapy. The life-long impact on growth and development, and potentially on long-term cardiovascular and psychosocial health, are significant and highlight the importance of future prospective studies in pediatric patients to explore these areas of uncertainty.
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Affiliation(s)
- Andrew J Bauer
- The Thyroid Center, Division of Endocrinology and Diabetes, The Children's Hospital of Philadelphia, The Perelman School of Medicine, The University of Pennsylvania, 3500 Civic Center Boulevard, Buerger Center, 12-149, Philadelphia, PA, 19104, USA.
| | - Ari J Wassner
- Thyroid Program, Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, 333 Longwood Avenue, 2nd floor, Boston, MA, 02115, USA
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Janson A, Hällström C, Iversen M, Finder M, Elimam A, Nergårdh R. Initial low-dose oral levothyroxine in a child with Down syndrome, myxedema, and cardiogenic shock. Clin Case Rep 2019; 7:1291-1296. [PMID: 31360469 PMCID: PMC6637322 DOI: 10.1002/ccr3.2169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 04/01/2019] [Accepted: 04/04/2019] [Indexed: 01/16/2023] Open
Abstract
Myxedema is extremely rare in children, and guidelines are lacking. We treated a 12-year-old girl with myxedema and cardiogenic shock with initial low dose (0.3-2.5 μg/kg body weight/day) of oral levothyroxine and intensive care. Oral administration may safely revert children's myxedema in a dosage resembling that for hypothyroidism.
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Affiliation(s)
- Annika Janson
- Department of PediatricsKarolinska University Hospital HuddingeHuddingeSweden
- Department of Children's and Women's HealthKarolinska InstitutetSolnaSweden
| | - Cathrin Hällström
- Department of Intensive Care MedicineKarolinska University Hospital HuddingeHuddingeSweden
| | - Magnus Iversen
- Department of Intensive Care MedicineKarolinska University Hospital HuddingeHuddingeSweden
| | - Mikael Finder
- Department of NeonatologyKarolinska University Hospital HuddingeHuddingeSweden
- Department of Clinical Sciences, Intervention and TechnologyKarolinska InstitutetSolnaSweden
| | - Amira Elimam
- Department of PediatricsKarolinska University Hospital HuddingeHuddingeSweden
- Department of Clinical Sciences, Intervention and TechnologyKarolinska InstitutetSolnaSweden
| | - Ricard Nergårdh
- Department of PediatricsKarolinska University Hospital HuddingeHuddingeSweden
- Department of Children's and Women's HealthKarolinska InstitutetSolnaSweden
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6
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Leung AKC, Leung AAC. Evaluation and management of the child with hypothyroidism. World J Pediatr 2019; 15:124-134. [PMID: 30734891 DOI: 10.1007/s12519-019-00230-w] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 01/14/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND Thyroid hormones are critical for early neurocognitive development as well as growth and development throughout childhood. Prompt recognition and treatment of hypothyroidism is, therefore, of utmost importance to optimize physical and neurodevelopmental outcomes. DATA SOURCES A PubMed search was completed in Clinical Queries using the key terms "hypothyroidism". RESULTS Hypothyroidism may be present at birth (congenital hypothyroidism) or develop later in life (acquired hypothyroidism). Thyroid dysgenesis and dyshormonogenesis account for approximately 85% and 15% of permanent cases of congenital primary hypothyroidism, respectively. More than 95% of infants with congenital hypothyroidism have few, if any, clinical manifestations of hypothyroidism. Newborn screening programs allow early detection of congenital hypothyroidism. In developed countries, Hashimoto thyroiditis is the most common cause of goiter and acquired hypothyroidism in children and adolescents. Globally, iodine deficiency associated with goiter is the most common cause of hypothyroidism. Central hypothyroidism is uncommon and may be associated with other congenital syndromes and deficiencies of other pituitary hormones. Familiarity of the clinical features would allow prompt diagnosis and institution of treatment. CONCLUSIONS To optimize neurocognitive outcome in infants with congenital hypothyroidism, treatment with levothyroxine should be started as soon as possible, preferably within the first 2 weeks of life. Children with acquired hypothyroidism should also be treated early to ensure normal growth and development as well as cognitive outcome. The target is to keep serum TSH < 5 mIU/L and to maintain serum free T4 or total T4 within the upper half of the age-specific reference range, with elimination of all symptoms and signs of hypothyroidism.
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Affiliation(s)
- Alexander K C Leung
- Department of Pediatrics, The University of Calgary, and The Alberta Children's Hospital, #200, 233 - 16th Avenue NW, Calgary, AB, T2M 0H5, Canada.
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Abstract
Thyroid hormone has important physiologic functions in nearly every organ system. The critical role of thyroid hormone in growth and in physical and neurologic development lends particular importance to the prompt diagnosis and appropriate treatment of hypothyroidism in infants and children. Congenital hypothyroidism is common and has potentially devastating neurologic consequences. While the approach to diagnosis and treatment of severe congenital hypothyroidism is well established, data continue to emerge about the genetic causes, clinical significance, and prognosis of the milder forms of congenital hypothyroidism that are increasingly being diagnosed by newborn screening. Similarly, the diagnosis and treatment of severe acquired hypothyroidism is straightforward and clearly of clinical benefit, but uncertainty remains about the optimal management of mild subclinical hypothyroidism. This review summarizes current knowledge of the causes, clinical manifestations, diagnosis, treatment, and prognosis of hypothyroidism in infants and children, with a focus on recent developments and areas of uncertainty in this field.
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Lima Carvalho MDF, de Medeiros JS, Valença MM. Headache in recent onset hypothyroidism: Prevalence, characteristics and outcome after treatment with levothyroxine. Cephalalgia 2016; 37:938-946. [DOI: 10.1177/0333102416658714] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective The objective of this article is to analyze the features of headache attributed to hypothyroidism (HAH), evaluate the differences between groups with and without HAH, between “overt” and “subclinical” hypothyroidism groups, and evaluate outcomes after levothyroxine treatment. Methods Patients with hypothyroidism were selected in a cross-sectional study, followed prospectively for 12 months, and classified as subclinical or overt hypothyroidism. The patients were divided into two groups: with and without HAH. Results HAH was reported by 73/213 (34%) patients, involving the following areas: fronto-orbital (49%), temporal (37%), and posterior part of the head (15%). The HAH features were as follows: pulsatile (63%), four to 72 hours’ duration (78%), unilateral (47%), nausea/vomiting (60%), and moderate-severe intensity (72%). Hypothyroidism symptomatology was similar in both groups, except for a greater frequency of hoarseness in the group with HAH. Migraine history was more frequent in the patients with HAH (53% vs 38%, p < 0.05). The frequency of HAH was similar both in overt and subclinical hypothyroidism. After levothyroxine treatment 78% reported a decrease in HAH frequency. Subclinical and overt hypothyroid patients reported a similar alleviation of their headaches. Conclusion Patients with HAH may present with unilateral, pulsatile, episodic pattern, and nausea/vomiting, which is at odds with the criteria for HAH established by ICHD 3 beta. Not all individuals responded to levothyroxine, and patients with the subclinical form of hypothyroidism benefit from this treatment.
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Affiliation(s)
- Marise de Farias Lima Carvalho
- Neurology and Neurosurgery Unit, Department of Neuropsychiatry, Medical School Campus Recife, Federal University of Pernambuco, Brazil
- Department of Internal Medicine, Medical School Campus Agreste, Federal University of Pernambuco, Brazil
- Centro de Saúde Ana Rodrigues, Caruaru, Brazil
| | - Josian Silva de Medeiros
- Neurology and Neurosurgery Unit, Department of Neuropsychiatry, Medical School Campus Recife, Federal University of Pernambuco, Brazil
- Catholic University of Pernambuco, Recife, Brazil
| | - Marcelo Moraes Valença
- Neurology and Neurosurgery Unit, Department of Neuropsychiatry, Medical School Campus Recife, Federal University of Pernambuco, Brazil
- Neurology and Neurosurgery Unit, Hospital Esperança, Recife, Brazil
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Marques P, Jacinto S, Pinto MDC, Limbert C, Lopes L. Diplopia, Convergent Strabismus, and Eye Abduction Palsy in a 12-Year-Old Boy with Autoimmune Thyroiditis. Case Rep Pediatr 2016; 2016:5823137. [PMID: 27379191 PMCID: PMC4917683 DOI: 10.1155/2016/5823137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 03/28/2016] [Indexed: 11/17/2022] Open
Abstract
Pseudotumor cerebri (PTC) is defined by clinical criteria of increased intracranial pressure, elevated intracranial pressure with normal cerebrospinal fluid (CSF) composition, and exclusion of other causes such tumors, vascular abnormalities, or infections. The association of PTC with levothyroxine (LT4) has been reported. A 12-year-old boy has been followed up for autoimmune thyroiditis under LT4. Family history was irrelevant for endocrine or autoimmune diseases. A TSH level of 4.43 μUI/mL (0.39-3.10) motivated a LT4 adjustment from 75 to 88 μg/day. Five weeks later, he developed horizontal diplopia, convergent strabismus with left eye abduction palsy, and papilledema. Laboratorial evaluation revealed elevated free thyroxine level (1.05 ng/dL [0.65-1.01]) and low TSH, without other alterations. Lumbar puncture was performed and CSF opening pressure was 24 cm H2O with normal composition. Blood and CSF cultures were sterile. Brain MRI was normal. LT4 was temporarily discontinued and progressive improvement was observed, with a normal fundoscopy at day 10 and reversion of diplopia one month later. LT4 was restarted at lower dose and gradually titrated. The boy is currently asymptomatic. This case discloses the potential role of LT4 in inducing PTC. Despite its rarity and unclear association, PTC must be seen as a potential complication of LT4, after excluding all other intracranial hypertension causes.
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Affiliation(s)
- Pedro Marques
- Department of Endocrinology, Instituto Português de Oncologia de Lisboa, Lisbon, Portugal
| | - Sandra Jacinto
- Department of Pediatric Neurology, Hospital Dona Estefânia, Lisbon, Portugal
| | - Maria do Carmo Pinto
- Adolescent Unit, Department of Pediatrics, Hospital Dona Estefânia, Lisbon, Portugal
| | - Catarina Limbert
- Pediatric Endocrinology Unit, Department of Pediatrics, Hospital Dona Estefânia, Lisbon, Portugal
| | - Lurdes Lopes
- Pediatric Endocrinology Unit, Department of Pediatrics, Hospital Dona Estefânia, Lisbon, Portugal
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10
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Update on Common Childhood Endocrine Disorders. Curr Probl Pediatr Adolesc Health Care 2015; 45:250-80. [PMID: 26356799 DOI: 10.1016/j.cppeds.2015.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 06/23/2015] [Indexed: 11/21/2022]
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Beal CJ, Pao KY, Hogan RN. Intracranial hypertension due to levothyroxine use. J AAPOS 2014; 18:504-7. [PMID: 25266827 DOI: 10.1016/j.jaapos.2014.06.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Revised: 04/23/2014] [Accepted: 06/12/2014] [Indexed: 11/28/2022]
Abstract
We report a case of intracranial hypertension in a 13-year-old boy on levothyroxine therapy for hypothyroidism and review the literature describing this rare association. He presented with severe headaches and was found to have bilateral optic disk edema and elevated intracranial pressure shortly after an increase in his dosage of levothyroxine. The optic disk edema and headaches resolved with decreasing the levothyroxine and initiating acetazolamide.
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Affiliation(s)
- Casey J Beal
- Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Kristina Y Pao
- Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - R Nick Hogan
- Department of Neuro-ophthalmology, University of Texas Southwestern Medical Center, Dallas, Texas; Department of Ocular Pathology, University of Texas Southwestern Medical Center, Dallas, Texas.
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12
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Abstract
Idiopathic intracranial hypertension (IIH) is a disease of unknown cause typically affecting obese women in the childbearing years. Although headache is the most common symptom, the major morbidity of IIH is visual loss, with 5% to 10% of patients progressing to blindness. While about 95% of patients with IIH have visual loss documented by perimetry, only about one-third notice their visual loss because most loss occurs in the peripheral visual field. Since treatment decisions in IIH are made primarily by changes in visual field function, serial perimetry is the most critical test to obtain when following patients with IIH. This article describes the role of visual field testing in the monitoring of IIH patients in clinical practice, including its importance in communication among providers.
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13
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Abstract
Thyroid hormone deficiency can have important repercussions. Treatment with thyroid hormone in replacement doses is essential in patients with hypothyroidism. In this review, we critically discuss the thyroid hormone formulations that are available and approaches to correct replacement therapy with thyroid hormone in primary and central hypothyroidism in different periods of life such as pregnancy, birth, infancy, childhood, and adolescence as well as in adult patients, the elderly, and in patients with comorbidities. Despite the frequent and long term use of l-T4, several studies have documented frequent under- and overtreatment during replacement therapy in hypothyroid patients. We assess the factors determining l-T4 requirements (sex, age, gender, menstrual status, body weight, and lean body mass), the major causes of failure to achieve optimal serum TSH levels in undertreated patients (poor patient compliance, timing of l-T4 administration, interferences with absorption, gastrointestinal diseases, and drugs), and the adverse consequences of unintentional TSH suppression in overtreated patients. Opinions differ regarding the treatment of mild thyroid hormone deficiency, and we examine the recent evidence favoring treatment of this condition. New data suggesting that combined therapy with T3 and T4 could be indicated in some patients with hypothyroidism are assessed, and the indications for TSH suppression with l-T4 in patients with euthyroid multinodular goiter and in those with differentiated thyroid cancer are reviewed. Lastly, we address the potential use of thyroid hormones or their analogs in obese patients and in severe cardiac diseases, dyslipidemia, and nonthyroidal illnesses.
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Affiliation(s)
- Bernadette Biondi
- Department of Clinical Medicine and Surgery (B.B.), University of Naples Federico II, 80131 Naples, Italy; and Washington Hospital Center (L.W.), Washington, D.C. 20010
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14
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Abstract
Thyroid disorders are common in the general population and in hospitalized patients. Thyroid disease may present first with neurological complications or else may occur concurrently in patients suffering other neurological disorders, particularly those with an autoimmune etiology. For this reason neurologists will commonly encounter patients with thyroid disease. This chapter provides an overview of the neurological complications and associations of disorders of the thyroid gland. Particular emphasis is placed on conditions such as thyrotoxic periodic paralysis and myxedema coma in which the underlying thyroid disorder may be occult leading to a first, often emergency, presentation to a neurologist. Information about clinical features, diagnosis, pathogenesis, therapy, and prognosis is provided. Emphasis is placed on those aspects most likely to be relevant to the practicing neurologist and the interested reader is directed to references to good, recent review articles for further information.
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Affiliation(s)
- Clare A Wood-Allum
- Sheffield Institute for Translational Neuroscience, University of Sheffield and Department of Neurology, Royal Hallamshire Hospital, Sheffield, UK
| | - Pamela J Shaw
- Sheffield Institute for Translational Neuroscience, University of Sheffield and Department of Neurology, Royal Hallamshire Hospital, Sheffield, UK.
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Affiliation(s)
- John Chen
- Department of Ophthalmology and Visual Sciences, University of Iowa
| | - Michael Wall
- Department of Ophthalmology and Visual Sciences, University of Iowa
- Department of Neurology, University of Iowa
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16
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Abstract
Hypothyroidism denotes deficient production of thyroid hormone by the thyroid gland and can be primary (abnormality in thyroid gland itself) or secondary/central (as a result of hypothalamic or pituitary disease). The term 'subclinical hypothyroidism' is used to define that grade of primary hypothyroidism in which there is an elevated thyroid-stimulating hormone (TSH) concentration in the presence of normal serum free thyroxine (T4) and triiodothyronine (T3) concentrations. Subclinical hypothyroidism may progress to overt hypothyroidism in approximately 2-5% cases annually. All patients with overt hypothyroidism and subclinical hypothyroidism with TSH >10 mIU/L should be treated. There is consensus on the need to treat subclinical hypothyroidism of any magnitude in pregnant women and women who are contemplating pregnancy, to decrease the risk of pregnancy complications and impaired cognitive development of the offspring. However, controversy remains regarding treatment of non-pregnant adult patients with subclinical hypothyroidism and serum TSH values ≤10 mIU/L. In this subgroup, treatment should be considered in symptomatic patients, patients with infertility, and patients with goitre or positive anti-thyroid peroxidase (TPO) antibodies. Limited evidence suggests that treatment of subclinical hypothyroidism in patients with serum TSH of up to 10 mIU/L should probably be avoided in those aged >85 years. Other pituitary hormones should be evaluated in patients with central hypothyroidism, especially assessment of the hypothalamic-pituitary-adrenal axis, since hypocortisolism, if present, needs to be rectified prior to initiating thyroid hormone replacement. Levothyroxine (LT4) monotherapy remains the current standard for management of primary, as well as central, hypothyroidism. Treatment can be started with the full calculated dose for most young patients. However, treatment should be initiated at a low dose in elderly patients, patients with coronary artery disease and patients with long-standing severe hypothyroidism. In primary hypothyroidism, treatment is monitored with serum TSH, with a target of 0.5-2.0 mIU/L. In patients with central hypothyroidism, treatment is tailored according to free or total T4 levels, which should be maintained in the upper half of the normal range for age. In patients with persistently elevated TSH despite an apparently adequate replacement dose of LT4, poor compliance, malabsorption and the presence of drug interactions should be checked. Over-replacement is common in clinical practice and is associated with increased risk of atrial fibrillation and osteoporosis, and hence should be avoided.
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Affiliation(s)
- Deepak Khandelwal
- Department of Endocrinology and Metabolism, All India Institute of Medical Sciences, New Delhi, India
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Cappa M, Bizzarri C, Crea F. Autoimmune thyroid diseases in children. J Thyroid Res 2010; 2011:675703. [PMID: 21209713 PMCID: PMC3010678 DOI: 10.4061/2011/675703] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Revised: 10/10/2010] [Accepted: 10/19/2010] [Indexed: 11/20/2022] Open
Abstract
The two major autoimmune thyroid diseases (ATDs) include Graves' disease (GD) and autoimmune thyroiditis (AT); both of which are characterized by infiltration of the thyroid by T and B cells reactive to thyroid antigens, by the production of thyroid autoantibodies and by abnormal thyroid function (hyperthyroidism in GD and hypothyroidism in AT). While the exact etiology of thyroid autoimmunity is not known, it is believed to develop when a combination of genetic susceptibility and environmental encounters leads to breakdown of tolerance. It is important to recognize thyroid dysfunction at an early stage by maintaining an appropriate index of suspicion.
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Affiliation(s)
- Marco Cappa
- Unit of Endocrinology and Diabetes, Bambino Gesù Children's Hospital, University of Rome "Tor Vergata", Piazza S. Onofrio 4, 00165 Rome, Italy
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Abstract
Idiopathic intracranial hypertension ((IIH) is characterized by increased cerebrospinal fluid pressure of unknown cause. It is predominantly a disease of women in the childbearing years. Although the cause of IIH remains obscure, it has become clear that loss of visual function is common and patients may progress to blindness if untreated. Diagnosis should adhere to the modified Dandy criteria and other causes of intracranial hypertension sought. IIH patient management should include serial perimetry and optic disc grading or photography. The proper therapy can then be selected and visual loss prevented or reversed. Although there are no evidence-based data to guide therapy, there is an ongoing randomized double-blind controlled treatment trial of IIH investigating diet and medical therapy.
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Affiliation(s)
- Michael Wall
- Department of Neurology, College of Medicine, University of Iowa, Veterans Administration Medical Center, Iowa City, IA 52242, USA.
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19
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Abstract
Medication- or substance-induced headache is probably an underrecognized entity with numerous etiologies, including prescribed medication, over-the-counter medication, illicit drugs, anesthetic agents, foods, food additives, beverages, vitamins, inhaled substances, and substances used in diagnostic procedures. The author performs a systemic review of the literature to provide an exhaustive description of the relationship between medications and substances and headaches of various types, along with pathophysiologic mechanisms whenever possible. Suggestions for improved identification of this phenomenon and its avoidance are provided. More scientific evaluation of substances and their possible association with headache is required with almost all substances indicated herein.
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Affiliation(s)
- Cory Toth
- Department of Clinical Neurosciences, University of Calgary, Alberta, Canada.
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Raghavan S, DiMartino-Nardi J, Saenger P, Linder B. Pseudotumor cerebri in an infant after L-thyroxine therapy for transient neonatal hypothyroidism. J Pediatr 1997; 130:478-80. [PMID: 9063429 DOI: 10.1016/s0022-3476(97)70215-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Pseudotumor cerebri is generally a benign disorder. It has been reported to occur in hypothyroidism, particularly after the initiation of L-thyroxine replacement therapy. Previous case reports have involved children primarily in the peripubertal age range (approximately 8 to 13 years). We report here the development of pseudotumor cerebri in an infant who required treatment with L-thyroxine for transient neonatal hypothyroidism as a result of maternal thyroid-stimulating hormone receptor-blocking antibodies.
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Affiliation(s)
- S Raghavan
- Department of Pediatrics, Monteflore Medical Center, Albert Einstein College of Medicine, Bronx, New York 10467, USA
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Abstract
Although the cause of IIH remains obscure, it has become clear that loss of visual function is common and patients may progress to blindness. Diagnosis should adhere to the modified Dandy criteria. Recent case-control studies cast doubt on the validity of many frequently cited conditions associated with IIH. Valid associations include obesity, recent weight gain, female gender, vitamin A intoxication, and steroid withdrawal. IIH patient management should include serial perimetry using a sensitive disease-specific strategy. This is done so the proper therapy can be selected and visual loss prevented or reversed.
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Affiliation(s)
- M Wall
- Department of Neurology, University of Iowa, College of Medicine, Iowa City 52242, USA
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23
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Campos SP, Olitsky S. Idiopathic intracranial hypertension after L-thyroxine therapy for acquired primary hypothyroidism. Clin Pediatr (Phila) 1995; 34:334-7. [PMID: 7656515 DOI: 10.1177/000992289503400608] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- S P Campos
- Department of Pediatrics, Children's Hospital of Buffalo, NY 14222, USA
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24
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Abstract
Idiopathic intracranial hypertension is an uncommon condition in children and is seen only about once a year in a large referral hospital. Sex incidence is equal, and obesity is a feature in about one third of patients. This article reviews the 30-year experience in an institution where idiopathic intracranial hypertension in adults has been extensively studied. Symptomatic causes of intracranial hypertension and both medical and surgical therapeutic options are reviewed.
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Affiliation(s)
- P Babikian
- Department of Neurology, University of Mississippi, Jackson
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25
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Adams C, Dean HJ, Israels SJ, Patton A, Fewer DH. Primary hypothyroidism with intracranial hypertension and pituitary hyperplasia. Pediatr Neurol 1994; 10:166-8. [PMID: 8024669 DOI: 10.1016/0887-8994(94)90053-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A 12-year-old girl presented with primary hypothyroidism, secondary pituitary hyperplasia, and intracranial hypertension. Cranial computed tomography revealed a sellar mass with suprasellar extension. She responded to medical treatment. Intracranial hypertension may be associated with primary hypothyroidism prior to thyroxine treatment. Because significant pituitary hyperplasia can be associated with primary hypothyroidism, it is vital to have endocrine investigation prior to consideration of surgical removal of an apparent pituitary tumor.
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Affiliation(s)
- C Adams
- Department of Neurology, Children's Hospital, Winnipeg, Manitoba, Canada
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26
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Rovet JF, Daneman D, Bailey JD. Psychologic and psychoeducational consequences of thyroxine therapy for juvenile acquired hypothyroidism. J Pediatr 1993; 122:543-9. [PMID: 8463898 DOI: 10.1016/s0022-3476(05)83533-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The observation of severe behavioral reactions or learning problems in three teenagers treated with L-thyroxine for juvenile acquired hypothyroidism prompted us to conduct a prospective study of achievement and behavioral characteristics of patients with newly diagnosed juvenile acquired hypothyroidism. On diagnosis of juvenile acquired hypothyroidism and before treatment with L-thyroxine, 23 children and adolescents underwent a comprehensive battery of psychoeducational tests, which was repeated after 3, 12, and 24 months of replacement therapy. Results revealed that adverse behavioral reactions and learning problems were relatively rare in these children, although symptoms of juvenile acquired hypothyroidism were associated with increased distractibility, hyperactivity, and poorer achievement. The least gain in achievement was made by children with more severe hypothyroidism at diagnosis; children with the best psychologic outcome were those who achieved euthyroidism more slowly. We conclude that severe behavioral manifestations of L-thyroxine therapy for juvenile acquired hypothyroidism are uncommon, but mild behavioral symptoms and poorer school achievement may occur in about 25% of patients, who represent the most severe cases at diagnosis.
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Affiliation(s)
- J F Rovet
- Department of Psychology, Hospital for Sick Children, Toronto, Canada
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27
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Abstract
This review focuses on the features of pseudotumor cerebri in the pediatric age group. There is no sex predilection in children, and obesity does not appear to be an important factor. Infants and young children may present with irritability, apathy, or somnolence, rather than headache. Dizziness and ataxia may also occur. Papilledema is infrequently noted in pediatric patients if the fontanelles are open or the sutures are split. Pre-adolescents appear more likely than adults or adolescents to have manifestations of their pseudotumor cerebri other than headache and papilledema, including lateral rectus pareses, vertical strabismus, facial paresis, back and neck pain. Among the etiologies that are particularly pertinent to children are tetracycline therapy, malnutrition or renutrition, and the correction of hypothyroidism. Children with pseudotumor cerebri are at risk for visual loss and their visual function must be closely monitored. Surgical intervention is imperative when vision is threatened.
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Affiliation(s)
- S Lessell
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston
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28
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Affiliation(s)
- G Alpan
- Department of Pediatrics, Hadassah University Hospital, Jerusalem, Israel
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29
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30
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Trevisol-Bittencourt PC, Sander JW. [Epilepsy and Turner's syndrome: report of a case and review of the literature]. ARQUIVOS DE NEURO-PSIQUIATRIA 1990; 48:360-5. [PMID: 2124799 DOI: 10.1590/s0004-282x1990000300016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Fifty years ago Henry Turner identified the association of sexual infantilism, webbed neck and cubitus valgus to be a separate entity and subsequently gonadal dysgenesis was appended to the definition. Twenty years after the original report it was demonstrated that in typical patients with Turner's syndrome the chromosomal composition was 45.XO and in addition cases of mosaicism were described. Although much general information is now available about Turner's syndrome the neurological complications are largely neglected. In this paper we review the case of a patient with Turner's syndrome who at age of 16 years developed severe epilepsy. In addition, a survey of the literature concerning neurological abnormalities associated with this syndrome is presented. It seems clear that neurological symptoms in patients with Turner's syndrome deserves consideration for many reasons; may be the most significant is the evidence that patients with this syndrome have a high incidence of vascular abnormalities, which may also affect the CNS. Empirically patients with Turner's syndrome are at risk of developing cerebral vascular diseases. Also the relatively high frequency of cognitive abnormalities in these patients seems to justify the hypothesis that in a certain percentage of cases a CNS dysfunction or malformation, not necessarily of a vascular nature, may be a component of the syndrome still nor described.
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31
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Farley JD, Toth EL, Ryan EA. Primary hypothyroidism presenting as growth delay and pituitary enlargement. Can J Neurol Sci 1988; 15:35-7. [PMID: 3345461 DOI: 10.1017/s0317167100027153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We report the case of a young boy being considered for pituitary surgery because of pituitary enlargement found during assessment of growth delay. There was no goitre but he was hypothyroid clinically and biochemically. The finding of an elevated TSH suggested primary thyroid disease with thyrotroph hyperplasia. Treatment with L-thyroxine resulted in prompt resolution of his pituitary enlargement and improvement in his visual fields.
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Affiliation(s)
- J D Farley
- Division of Endocrinology and Metabolism, University of Alberta, Edmonton, Canada
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32
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33
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Wheatley T, Clark JD, Edwards OM, Jordan K. Retinal haemorrhages and papilloedema due to benign intracranial hypertension in a pregnant diabetic. Diabet Med 1986; 3:482-4. [PMID: 2951204 DOI: 10.1111/j.1464-5491.1986.tb00799.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A case of benign intracranial hypertension associated with generalized oedema is reported in a normotensive pregnant patient with long-standing insulin-treated diabetes mellitus. Following treatment with bed rest, chlorthalidone and dexamethasone the condition resolved and a healthy infant was delivered. This condition, not previously reported in a diabetic pregnancy, must be differentiated from other causes of bilateral optic nerve abnormalities associated with retinal haemorrhages and oedema, including diabetic retinopathy, diabetic optic neuropathy, accelerated hypertension and cerebral mass lesions. Treatment is required to prevent permanent visual impairment due to pressure on the susceptible optic nerve of the diabetic patient and to avoid the metabolic consequences to both mother and fetus of poor nutritional intake due to nausea.
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34
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Abstract
We report two infants with pseudotumor cerebri associated with renal disease. The pathogenesis of increased intracranial pressure in this clinical setting is unclear, but may be mediated by one or more of the conditions commonly associated with pseudotumor cerebri, including sinus thrombosis, increased intravascular fluid volume, anemia, and endocrine disturbances resulting in abnormal calcium and phosphorus metabolism. The onset of pseudotumor cerebri also may be related to changes in vasopressin levels that affect brain water permeability.
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Affiliation(s)
- M J Noetzel
- Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
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35
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36
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Panza N, De Rosa M, Lombardi G, Salvatore M. Pseudotumor cerebri and thyroid-replacement therapy in patients affected by differentiated thyroid carcinoma. J Endocrinol Invest 1985; 8:357-8. [PMID: 4067207 DOI: 10.1007/bf03348513] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The pseudotumor cerebri, a neurological syndrome clinically characterized by headaches, vomiting and bilateral papilledema, occurred in two patients, previously subjected to total thyroidectomy for differentiated thyroid carcinoma, after initiation of levothyroxine replacement therapy. In patients with thyroid cancer, subjected to thyroidectomy and then thyroid hormone replacement therapy, the possible development of pseudotumor cerebri syndrome should be considered and differentiated from CNS symptoms due to brain metastases.
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37
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Abstract
One of 170 patients with karyotype-proven Turner syndrome from our institution has had pseudotumour cerebri. This patient and one previous report suggest that patients with Turner syndrome may be predisposed to increased intracranial pressure. Fourteen patients with pseudotumour cerebri were ascertained from hospital records; karyotypes of four were obtained and were normal. Karyotyping may be appropriate in women with pseudotumour cerebri who also have infertility, short stature, multiple pregnancy losses, or other features suggestive of Turner syndrome.
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38
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McVie R. Abnormal TSH regulation, pseudotumor cerebri, and empty sella after replacement therapy in juvenile hypothyroidism. J Pediatr 1984; 105:768-70. [PMID: 6502306 DOI: 10.1016/s0022-3476(84)80302-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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39
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