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Wenzel M Hackeng Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands

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Lodewijk A A Brosens Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands

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Koen M A Dreijerink Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
Department of Endocrinology, Amsterdam University Medical Centers, VU University Medical Center, Amsterdam, The Netherlands

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vs aggressive insulinomas The low incidence of aggressive insulinomas has resulted in few data on genetic alterations in these tumors. The first evidence of biological differences between indolent and aggressive insulinomas was discovered by

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Christine Sempoux Institute of Pathology, Department of Laboratory Medicine and Pathology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland

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Günter Klöppel Department of Pathology, Technical University Munich, Munich, Germany

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objective is then to relate the different β-cell changes in infants with CHI to the genetic alterations. Finally, the spectrum of β-cell changes that is associated with idiopathic or gastric bypass ANHH will be discussed. Table 1 Clinico

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Emanuel Christ Division of Endocrinology, Diabetology and Metabolism and Center of Endocrine Tumors, University Hospital of Basel, Basel, Switzerland

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Donato Iacovazzo Centre for Endocrinology, William Harvey Research Institute, Barts and London School of Medicine, Queen Mary University of London, London, United Kingdom

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Márta Korbonits Centre for Endocrinology, William Harvey Research Institute, Barts and London School of Medicine, Queen Mary University of London, London, United Kingdom

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Aurel Perren Institute of Pathology, University of Bern, Bern, Switzerland

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differentiate insulinomatosis from MEN1-related insulinomas on the basis of conventional or functional imaging. Family history, additional endocrine disorders (mainly primary hyperparathyroidism and pituitary tumors) and genetic testing can be helpful to

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Bence Sipos Department of Medical Oncology and Pneumology (Internal Medicine VIII), University Hospital Tubingen, Tübingen, Germany
ENETS Center of Excellence, University Hospital Tübingen, Tübingen, Germany

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Günter Klöppel Department of Pathology, Technical University Munich, Munich, Germany

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finding suggested that GCHN, as we called the disease ( Sipos et al. 2015 ), seems to be caused by two different pathomechanisms, of which one is associated with a GCGR gene mutation, while the other is not and lacks so far any known genetic alteration

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Wouter W de Herder Department of Internal Medicine, Sector of Endocrinology, Erasmus MC & Erasmus MC Cancer Institute, ENETS Center of Excellence, Rotterdam, the Netherlands

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Günter Klöppel Department of Pathology, Technical University Munich, Munich, Germany

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). Alternatively, the term ‘persistent hyperinsulinemic hypoglycemia in infancy’ is used ( Glaser et al. 1989 , Sempoux & Kloppel 2023 ). This condition represents a group of clinically, genetically and histologically heterogeneous disorders, characterized by

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