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Elham Barazeghi Department of Surgical Sciences, Uppsala University, Uppsala University Hospital, Rudbeck Laboratory, Uppsala, Sweden

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Per Hellman Department of Surgical Sciences, Uppsala University, Uppsala University Hospital, Rudbeck Laboratory, Uppsala, Sweden

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Gunnar Westin Department of Surgical Sciences, Uppsala University, Uppsala University Hospital, Rudbeck Laboratory, Uppsala, Sweden

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Peter Stålberg Department of Surgical Sciences, Uppsala University, Uppsala University Hospital, Rudbeck Laboratory, Uppsala, Sweden

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sections of intestinal mucosa were stained with the anti-PTPRM antibody (ab111207, Abcam) or a mouse monoclonal anti-chromogranin A antibody (LK2H10, Thermo Fisher Scientific) as mentioned above. Immunofluorescence: The sections were treated and incubated

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Paweł Komarnicki Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznań, Poland

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Paweł Gut Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznań, Poland

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Jan Musiałkiewicz Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznań, Poland

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Maja Cieślewicz Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznań, Poland

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Adam Maciejewski Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznań, Poland

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Prachi Patel Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznań, Poland

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George Mastorakos Unit of Endocrinology, Diabetes Mellitus and Metabolism, Aretaieion University Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece

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Marek Ruchała Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznań, Poland

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biomarkers for both prognostic and diagnostic purposes (e.g. 5-hydroxyindoleacetic acid, neuron-specific enolase, chromogranin A (CgA), and beta subunit of human chorionic gonadotropin) ( 5 , 6 , 7 , 8 ). Identification of an optimal biomarker for a given

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Joakim Crona Departments of Surgical Sciences, Medical Sciences, Uppsala University, S-751 85 Uppsala, Sweden

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Alberto Delgado Verdugo Departments of Surgical Sciences, Medical Sciences, Uppsala University, S-751 85 Uppsala, Sweden

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Dan Granberg Departments of Surgical Sciences, Medical Sciences, Uppsala University, S-751 85 Uppsala, Sweden

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Staffan Welin Departments of Surgical Sciences, Medical Sciences, Uppsala University, S-751 85 Uppsala, Sweden

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Peter Stålberg Departments of Surgical Sciences, Medical Sciences, Uppsala University, S-751 85 Uppsala, Sweden

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Per Hellman Departments of Surgical Sciences, Medical Sciences, Uppsala University, S-751 85 Uppsala, Sweden

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Peyman Björklund Departments of Surgical Sciences, Medical Sciences, Uppsala University, S-751 85 Uppsala, Sweden

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demonstrated expression for chromogranin A and a Ki67 index of 1%. Exome sequencing revealed seven SNVs, one was classified as benign and six as unknown. There was one missense variant in SDHC located at position 477C<T, resulting in amino acid substitution

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K E Lines
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R P Vas Nunes
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M Frost Academic Endocrine Unit, OCDEM, University of Oxford, Churchill Hospital, Oxford, UK

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C J Yates Academic Endocrine Unit, OCDEM, University of Oxford, Churchill Hospital, Oxford, UK

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M Stevenson Academic Endocrine Unit, OCDEM, University of Oxford, Churchill Hospital, Oxford, UK

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R V Thakker Academic Endocrine Unit, OCDEM, University of Oxford, Churchill Hospital, Oxford, UK

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sections for chromogranin A, insulin and glucagon using the diaminobenzidine (DAB) kit (Dako) and counterstained with haematoxylin, as previously described ( 16 , 35 ). Two additional sections from each pancreas were also fluorescently co-stained with BrdU

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Ashley K Clift Department of Surgery and Cancer, Imperial College London, London, UK

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Omar Faiz Department of Surgery, St Mark’s Hospital, London, UK

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Robert Goldin Centre for Pathology, Imperial College London, London, UK

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John Martin Department of Gastroenterology, Imperial College London, London, UK

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Harpreet Wasan Department of Surgery and Cancer, Imperial College London, London, UK

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Marc-Olaf Liedke Department of Surgery, Westkuesten Klinikum Heide, Heide, Germany

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Erik Schloericke Department of Surgery, Westkuesten Klinikum Heide, Heide, Germany

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Anna Malczewska Department of Surgery and Cancer, Imperial College London, London, UK
Department of Pathophysiology and Endocrinology, Medical University of Silesia, Katowice, Poland

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Guido Rindi Institute of Anatomic Pathology, Universita Cattolica del Sacro Cuore, Rome, Italy

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Mark Kidd Wren Laboratories, Branford, Connecticut, USA

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Irvin M Modlin Emeritus Professor Gastrointestinal Surgery, School of Medicine, Yale University, New Haven, Connecticut, USA

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Andrea Frilling Department of Surgery and Cancer, Imperial College London, London, UK

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disseminated disease ( 10 , 11 , 12 ). Furthermore, the limitations of currently available mono-analyte biomarkers for predicting disease activity and behaviour; for example, the poor sensitivity and specificity of chromogranin A, are appreciated in the

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Kate E Lines Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Mahsa Javid Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Anita A C Reed Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Gerard V Walls Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Mark Stevenson Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Michelle Simon MRC Harwell Institute, Mammalian Genetics Unit, Harwell Campus, Oxfordshire, UK

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Kreepa G Kooblall Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Sian E Piret Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Paul T Christie Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Paul J Newey Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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Ann-Marie Mallon MRC Harwell Institute, Mammalian Genetics Unit, Harwell Campus, Oxfordshire, UK

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Rajesh V Thakker Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), Churchill Hospital, Headington, Oxford, UK

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); anti-chromogranin A (AbCam ab301704); anti-insulin (AbCam ab7842); anti-glucagon (AbCam ab10561971) and anti-Kras (AbCam ab84573). All HRP-conjugated secondary antibodies (Jackson Laboratories) were applied for 1 h, followed by 3,3′-diaminobenzidine

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Carole Morin Hospices Civils de Lyon, Hôpital Edouard Herriot, Oncologie Digestive, Lyon Cedex 03, France

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Keo-Morakort Benedetto Hospices Civils de Lyon, Hôpital Edouard Herriot, Oncologie Digestive, Lyon Cedex 03, France

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Agathe Deville Hospices Civils de Lyon, Hôpital Louis Pradel, Médecine Nucléaire, Bron, France
Centre de Recherche en Cancérologie de Lyon, UMR Inserm 1052 CNRS 5286, Lyon Cedex 08, France

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Laurent Milot Hospices Civils de Lyon, Hôpital Edouard Herriot, Radiologie, Lyon Cedex 03, France
University of Lyon, Université Lyon 1, France

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Aurélie Theillaumas Hospices Civils de Lyon, Hôpital Edouard Herriot, Oncologie Digestive, Lyon Cedex 03, France

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Valérie Hervieu Centre de Recherche en Cancérologie de Lyon, UMR Inserm 1052 CNRS 5286, Lyon Cedex 08, France
University of Lyon, Université Lyon 1, France
Hospices Civils de Lyon, Institut de Pathologie Est, Bron Cedex, France

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Mathieu Pioche University of Lyon, Université Lyon 1, France
Hospices Civils de Lyon, Hôpital Edouard Herriot, Gastroentérologie, Lyon Cedex 03, France

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Gilles Poncet Centre de Recherche en Cancérologie de Lyon, UMR Inserm 1052 CNRS 5286, Lyon Cedex 08, France
University of Lyon, Université Lyon 1, France
Hospices Civils de Lyon, Hôpital Edouard Herriot, Chirurgie Digestive, Lyon Cedex 03, France

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Julien Forestier Hospices Civils de Lyon, Hôpital Edouard Herriot, Oncologie Digestive, Lyon Cedex 03, France

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Laurent François Hospices Civils de Lyon, Hôpital Louis Pradel, Exploration Fonctionnelle, Bron Cedex, France

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Francoise Borson-Chazot University of Lyon, Université Lyon 1, France
Hospices Civils de Lyon, Hôpital Louis Pradel, Endocrinologie, Bron Cedex, France

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Mustapha Adham University of Lyon, Université Lyon 1, France
Hospices Civils de Lyon, Hôpital Edouard Herriot, Chirurgie Digestive, Lyon Cedex 03, France

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Catherine Lombard-Bohas Hospices Civils de Lyon, Hôpital Edouard Herriot, Oncologie Digestive, Lyon Cedex 03, France

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Thomas Walter Hospices Civils de Lyon, Hôpital Edouard Herriot, Oncologie Digestive, Lyon Cedex 03, France
Centre de Recherche en Cancérologie de Lyon, UMR Inserm 1052 CNRS 5286, Lyon Cedex 08, France
University of Lyon, Université Lyon 1, France

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-up and the initial treatments was defined according to ENETS guidelines (French guidelines are similar) ( 3 , 6 ). Minimal work-up included laboratory test (chromogranin A), endoscopy along with endoscopic ultrasound (EUS), imaging (CT scan, MRI, and

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David C Llewellyn Department of Endocrinology ASO/EASO COM, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK

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Rajaventhan Srirajaskanthan Neuroendocrine Tumour Unit, Kings Health Partners ENETS Centre of Excellence, Denmark Hill, London, UK
Faculty of Life Sciences and Medicine, Kings College London, London, UK

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Royce P Vincent Faculty of Life Sciences and Medicine, Kings College London, London, UK
Department of Clinical Biochemistry, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK

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Catherine Guy Department of Cellular Pathology, Royal Sussex County Hospital, Eastern Road, Brighton, UK

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Eftychia E Drakou Department of Clinical Oncology, Guy’s Cancer Centre – Guy’s and St Thomas’ NHS Foundation Trust, Great Maze Pond, London, UK

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Simon J B Aylwin Department of Endocrinology ASO/EASO COM, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK
Neuroendocrine Tumour Unit, Kings Health Partners ENETS Centre of Excellence, Denmark Hill, London, UK

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Ashley B Grossman Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Oxford, UK
Barts and the London School of Medicine, Centre for Endocrinology, William Harvey Institute, London, UK
Neuroendocrine Tumour Unit, Royal Free Hospital, London, UK

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John K Ramage Neuroendocrine Tumour Unit, Kings Health Partners ENETS Centre of Excellence, Denmark Hill, London, UK
Faculty of Life Sciences and Medicine, Kings College London, London, UK

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Georgios K Dimitriadis Department of Endocrinology ASO/EASO COM, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK
Faculty of Life Sciences and Medicine, School of Life Course Sciences, Obesity Immunometabolism and Diabetes Group, King’s College London, London, UK

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solitary cells throughout the lung or form in clusters called neuroepithelial bodies ( 13 , 14 , 15 ). They remain in adult lungs, and continue to secrete bioactive substances such as calcitonin, calcitonin gene-related peptide, serotonin, chromogranin A

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Dirk-Jan van Beek Department of Endocrine Surgical Oncology, University Medical Center Utrecht, Utrecht, The Netherlands

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Rachel S van Leeuwaarde Department of Endocrine Oncology, University Medical Center Utrecht, Utrecht, The Netherlands

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Carolina R C Pieterman Department of Endocrine Oncology, University Medical Center Utrecht, Utrecht, The Netherlands

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Menno R Vriens Department of Endocrine Surgical Oncology, University Medical Center Utrecht, Utrecht, The Netherlands

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Gerlof D Valk Department of Endocrine Oncology, University Medical Center Utrecht, Utrecht, The Netherlands
Parelsnoer Institute, Utrecht, The Netherlands

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the DutchMEN Study Group
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an association between blood type O and the occurrence of neuroendocrine tumors in the national Dutch MEN1 cohort?  pNET, tumor markers Evidence-based screening DMSGPatient advocacy group What is the diagnostic accuracy of chromogranin A

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Sandeep Kumar Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India

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Anurag Ranjan Lila Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India

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Saba Samad Memon Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India

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Vijaya Sarathi Department of Endocrinology, Vydehi Institute of Medical Sciences and Research Centre, Bangalore, India

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Virendra A Patil Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India

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Santosh Menon Department of Pathology, Tata Memorial Hospital, Mumbai, India

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Neha Mittal Department of Pathology, Tata Memorial Hospital, Mumbai, India

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Gagan Prakash Department of Uro-oncology, Tata Memorial Hospital, Mumbai, India

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Gaurav Malhotra Department of Nuclear Medicine, Bhabha Atomic Research Centre, Mumbai, India

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Nalini S Shah Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India

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Tushar R Bandgar Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India

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synapatophysin, chromogranin A, and GATA-3 and negative for calcitonin. The patient was planned for 131 I-MIBG therapy for metastases and total thyroidectomy for MTC. Case B A 43-year-old female was referred for management of incidentally detected

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