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Shu-Meng Hu Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Yang-Juan Bai Department of Laboratory Medicine/Research Centre of Clinical Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Ya-Mei Li Department of Laboratory Medicine/Research Centre of Clinical Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Ye Tao Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Xian-Ding Wang Department of Urology/Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Tao Lin Department of Urology/Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Lan-Lan Wang Department of Laboratory Medicine/Research Centre of Clinical Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Yun-Ying Shi Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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growth of parathyroid cells from a polyclonal to a monoclonal manner, which forms parathyroid nodules that lack vitamin D receptor and calcium-sensing receptor and secrete autonomously ( 1 ). The autonomous secretion of parathyroid hormone (PTH) is

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Yuntao Song Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education/Beijing, Department of Head and Neck Surgery, Peking University Cancer Hospital and Institute, Beijing, China

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Jiaxin Wang Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education/Beijing, Department of Head and Neck Surgery, Peking University Cancer Hospital and Institute, Beijing, China

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Yanli Zhu Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education/Beijing, Department of Pathology, Peking University Cancer Hospital and Institute, Beijing, China

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Guohui Xu Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education/Beijing, Department of Head and Neck Surgery, Peking University Cancer Hospital and Institute, Beijing, China

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Tianxiao Wang Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education/Beijing, Department of Head and Neck Surgery, Peking University Cancer Hospital and Institute, Beijing, China

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Bin Zhang Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education/Beijing, Department of Head and Neck Surgery, Peking University Cancer Hospital and Institute, Beijing, China

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diagnosis. In our study, a parathyroid gland and a residual thyroid tissue were misdiagnosed as metastatic LNs. It is difficult to puncture the parathyroid gland without passing through the thyroid, so a washout parathyroid hormone test may be helpful

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Marianne C Astor Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway
Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway

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Kristian Løvås Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway
Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway

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Anette S B Wolff Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway

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Bjørn Nedrebø Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway

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Eirik Bratland Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway

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Jon Steen-Johnsen Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway

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Eystein S Husebye Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway
Department of Clinical Science, Department of Medicine, Department of Medicine, Pediatric Department, University of Bergen, Bergen, Norway

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. Hypoparathyroidism can be isolated or can be one component of a syndrome like DiGeorge syndrome, autoimmune polyglandular syndrome type 1 and other rarer syndromes. Transient hypocalcemia due to the relative resistance to parathyroid hormone (PTH) of the immature

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Jens F Rehfeld Department of Clinical Biochemistry, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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vary from proteins and peptides, to steroids, thyronins and monoamines. And cellularly, most new hormones appeared to originate from glands such as the pituitary, thyroid, parathyroids, pancreatic islets, adrenals, ovaries and testes. A major exception

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Behnaz Abiri Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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Majid Valizadeh Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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Amirhossein Ramezani Ahmadi Isfahan Endocrine and Metabolism Research Center, Isfahan University of Medical Sciences, Isfahan, Iran

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Shirin Amini Department of Nutrition, Shoushtar Faculty of Medical Sciences, Shoushtar, Iran

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Mohammad Nikoohemmat Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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Faeze Abbaspour Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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Farhad Hosseinpanah Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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may influence adipose tissue differentiation and growth, impacting obesity through gene expression regulation or by modulating parathyroid hormone (PTH), calcium, and leptin ( 11 , 12 , 13 ). While several observational studies have explored the link

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Werner F Blum University Children’s Hospital, Giessen, Germany

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Abdullah Alherbish Al Habib Medical Group, Riyadh, Saudi Arabia

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Afaf Alsagheir King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia

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Ahmed El Awwa Department of Pediatric Endocrinology & Diabetes, Hamad Medical Center, Doha, Qatar

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Walid Kaplan Tawam Hospital, Al Ain, UAE

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Ekaterina Koledova Global Medical Affairs Endocrinology, Merck KGaA, Darmstadt, Germany

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Martin O Savage William Harvey Research Institute, Barts and the London School of Medicine & Dentistry, London, UK

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hormones ↑ Glucocorticoids ↑ Androgens ↑ Oestrogens Low dose ↑, high dose ↓ Gonadotropins, thyroid stimulating hormone, adrenocorticotrophic hormone and parathyroid hormone stimulate local production of IGF-I in their

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E M Winter Leiden University Medical Center, Department of Internal Medicine, Division of Endocrinology, Center for Bone Quality, Leiden, the Netherlands

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A Ireland Musculoskeletal Science and Sports Medicine Research Centre, Department of Life Sciences, Manchester Metropolitan University, Manchester, United Kingdom

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N C Butterfield Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, Commonwealth Building, DuCane Road, London, United Kingdom

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M Haffner-Luntzer Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Ulm, Germany

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M-N Horcajada Nestlé Research, Department of Musculoskeletal Health, Innovation EPFL Park, Lausanne, Switzerland.

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A G Veldhuis-Vlug Leiden University Medical Center, Department of Internal Medicine, Division of Endocrinology, Center for Bone Quality, Leiden, the Netherlands
Jan van Goyen Medical Center, Department of Internal Medicine, Amsterdam, the Netherlands

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L Oei Department of Internal Medicine, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
Department of Epidemiology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands

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G Colaianni Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy

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N Bonnet Nestlé Research, Department of Musculoskeletal Health, Innovation EPFL Park, Lausanne, Switzerland.

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increased calcium resorption from bone. Bone resorption is mediated by parathyroid hormone-related protein (PTHrP). PTHrP is virtually absent in the non-pregnant state and increases from the first trimester of pregnancy until labor, after which levels drop

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Francesca Marini Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
F.I.R.M.O. Italian Foundation for the Research on Bone Diseases, Florence, Italy

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Francesca Giusti Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Teresa Iantomasi Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Federica Cioppi University Hospital of Florence, Azienda Ospedaliero Universitaria Careggi (AOUC), Florence, Italy

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Maria Luisa Brandi F.I.R.M.O. Italian Foundation for the Research on Bone Diseases, Florence, Italy

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of parathyroid hormone (PTH) and PTH-driven bone demineralization. Recently, Altieri et al. ( 8 ) reported that MEN1 patients with GEP-NETs had an increased prevalence of osteopenia and osteoporosis, mainly due to an altered nutritional status

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Julie Wulf Christensen Department of Nuclear Medicine, Herlev and Gentofte Hospital, Herlev, Denmark

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Karin Folmer Thøgersen Department of Nuclear Medicine, Herlev and Gentofte Hospital, Herlev, Denmark

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Lars Thorbjørn Jensen Department of Nuclear Medicine, Herlev and Gentofte Hospital, Herlev, Denmark

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Martin Krakauer Department of Nuclear Medicine, Herlev and Gentofte Hospital, Herlev, Denmark
Department of Clinical Physiology and Nuclear Medicine, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark

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Bent Kristensen Department of Nuclear Medicine, Herlev and Gentofte Hospital, Herlev, Denmark

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Finn Noe Bennedbæk Division of Endocrinology, Department of Medicine, Herlev and Gentofte Hospital, Herlev, Denmark

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Bo Zerahn Department of Nuclear Medicine, Herlev and Gentofte Hospital, Herlev, Denmark

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Introduction Primary hyperparathyroidism (PHPT) is characterised by hyperfunctioning tissue in one or more of the parathyroid glands, causing an increase in parathyroid hormone (PTH). This results in renal tubular reabsorption and osteoclastic

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Kathrin R Frey Department of Medicine I, Endocrine and Diabetes Unit, University Hospital, University of Würzburg, Würzburg, Germany

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Tina Kienitz Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany

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Julia Schulz Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany

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Manfred Ventz Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany

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Kathrin Zopf Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany

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Marcus Quinkler Endocrinology in Charlottenburg, Berlin, Germany

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follow-up visits (visit 2 and 3) for measurement of the following parameters: serum calcium (Ca; Roche Diagnostics GmbH), phosphorus (P; Roche Diagnostics GmbH), alkaline phosphatase (AP; Roche Diagnostics GmbH), parathyroid hormone (PTH; Elecsys

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