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Małgorzata Fuksiewicz Department of Pathology and Laboratory Diagnostics, Laboratory of Tumor Markers, Maria Sklodowska-Curie Institute – Oncology Center, Warsaw, Poland

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Maria Kowalska Department of Pathology and Laboratory Diagnostics, Laboratory of Tumor Markers, Maria Sklodowska-Curie Institute – Oncology Center, Warsaw, Poland

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Agnieszka Kolasińska-Ćwikła Department of Oncology and Radiotherapy, Maria Sklodowska-Curie Institute – Oncology Center, Warsaw, Poland

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Jarosław B Ćwikła The Faculty of Medical Sciences, University of Warmia and Mazury, Olsztyn, Poland

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Łukasz Sawicki Department of Clinical Surgery, Maria Sklodowska-Curie Institute – Oncology Center, Warsaw, Poland

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Katarzyna Roszkowska-Purska Department of Pathology, Maria Sklodowska-Curie Institute – Oncology Center, Warsaw, Poland

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Joanna Drygiel Department of Nutrition, Maria Sklodowska-Curie Institute – Oncology Center, Warsaw, Poland

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Beata Kotowicz Department of Pathology and Laboratory Diagnostics, Laboratory of Tumor Markers, Maria Sklodowska-Curie Institute – Oncology Center, Warsaw, Poland

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digestive tract, including 59 with tumours located in the pancreas and 72 with lesions in the small intestine, caecum and appendix (midgut – the tumours originating from the central part of the archenteron) and in the colon (hindgut – tumours of the

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Anna Malczewska Department of Endocrinology and Neuroendocrine Tumors, Department of Pathophysiology and Endocrinology, Medical University of Silesia, Katowice, Poland

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Magdalena Witkowska Department of Endocrinology and Neuroendocrine Tumors, Department of Pathophysiology and Endocrinology, Medical University of Silesia, Katowice, Poland

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Karolina Makulik Department of Endocrinology and Neuroendocrine Tumors, Department of Pathophysiology and Endocrinology, Medical University of Silesia, Katowice, Poland

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Agnes Bocian Department of Endocrinology and Neuroendocrine Tumors, Department of Pathophysiology and Endocrinology, Medical University of Silesia, Katowice, Poland

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Agata Walter Department of Endocrinology and Neuroendocrine Tumors, Department of Pathophysiology and Endocrinology, Medical University of Silesia, Katowice, Poland

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Joanna Pilch-Kowalczyk Department of Radiology and Nuclear Medicine, Medical University of Silesia, Katowice, Poland

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Wojciech Zajęcki Department of Pathology in Zabrze, Medical University of Silesia, Katowice, Poland

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Lisa Bodei Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Kjell Oberg Department of Endocrine Oncology, University Hospital, Uppsala, Sweden

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Beata Kos-Kudła Department of Endocrinology and Neuroendocrine Tumors, Department of Pathophysiology and Endocrinology, Medical University of Silesia, Katowice, Poland

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Introduction Neuroendocrine tumors (NETs) have increased in incidence with small intestine NETs (SINETs) being the most common and pancreatic NETs (PNETs), the third most common among gastroenteropancreatic (GEP) NETs per the SEER database

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Malgorzata Fuksiewicz Laboratory of Tumor Markers, Department of Pathology and Laboratory Diagnostics, The Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland

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Maria Kowalska Laboratory of Tumor Markers, Department of Pathology and Laboratory Diagnostics, The Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland

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Agnieszka Kolasinska-Cwikla Department of Oncology and Radiotherapy, The Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland

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Beata Kotowicz Laboratory of Tumor Markers, Department of Pathology and Laboratory Diagnostics, The Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland

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–88 years (median age, 65 years). Lesions were located in the pancreas in 82 patients, in the small intestine in 75 patients, in the rectum in 14 patients and in the stomach in 8 patients. According to the current 2019 World Health Organization (WHO

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Irvin M Modlin Wren Laboratories, Yale University School of Medicine, 35 NE Industrial Road, Branford, Connecticut, USA

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Harry Aslanian Wren Laboratories, Yale University School of Medicine, 35 NE Industrial Road, Branford, Connecticut, USA

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Lisa Bodei Wren Laboratories, Yale University School of Medicine, 35 NE Industrial Road, Branford, Connecticut, USA
Wren Laboratories, Yale University School of Medicine, 35 NE Industrial Road, Branford, Connecticut, USA

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Ignat Drozdov Wren Laboratories, Yale University School of Medicine, 35 NE Industrial Road, Branford, Connecticut, USA

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Mark Kidd Wren Laboratories, Yale University School of Medicine, 35 NE Industrial Road, Branford, Connecticut, USA

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1 included 91 GEP-NETs (gastric, n =3; duodenum, n =1; pancreas, n =41; small intestine, n =40; appendix, n =3; and colorectum, n =3), 18 with an unknown primary, and 16 non-GEP-NETs. Histopathologically, 51% were G1, 27% G2, and 12% G3

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Merete Gedde-Dahl
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Espen Thiis-Evensen
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Andreas Myklebust Tjølsen Section of Gastroenterology, University of Oslo School of Medicine, Department of Transplantation Medicine, Oslo University Hospital, Rikshospitalet, Postboks 4953, Nydalen, 0424 Oslo, Norway

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Kjerstin Skrede Mordal
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Morten Vatn
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Deidi S Bergestuen
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characteristics. Total group ( n =34) Gender  Men 18 (52.9%)  Women 16 (47.1%) Age, years (median, range) 62 (18–76) Primary tumor location  Small intestine 33 (97.1%)  Appendix 1 (2

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Wafaa M Rashed Research Department, Children’s Cancer Hospital Egypt (CCHE-57357), Cairo, Egypt
Armed Forces College of Medicine, Cairo, Egypt

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Anas Saad Faculty of Medicine, Damascus University, Damascus, Syria

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Muneer Al-Husseini Faculty of Medicine, Ain Shams University, Cairo, Egypt

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Ahmed Mahmoud Galal Armed Forces College of Medicine, Cairo, Egypt

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Assem Mohamed Ismael Armed Forces College of Medicine, Cairo, Egypt

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Ahmed M Al-Tayep Armed Forces College of Medicine, Cairo, Egypt

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Ayman El Shafie Armed Forces College of Medicine, Cairo, Egypt

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Mahmoud Ahmed Ali Armed Forces College of Medicine, Cairo, Egypt

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Ahmad Samir Alfaar Charité – Universitätsmedizin Berlin, Campus Virchow Klinikum, Ophthalmology Department, Berlin, Germany

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endocrine tissue (including the thymus and excluding thyroid) (O/E = 38.3, 95% CI = 10.4–98.1); the small intestine (O/E = 8.9, 95% CI = 1.1–32); the liver (O/E = 8.7, 95% CI = 1.1–31.6); the stomach (O/E = 5, 95% CI = 1–14.5); nodal NHL (O/E = 3.8, 95% CI

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Anna Malczewska Department of Endocrinology and Neuroendocrine Tumours, Medical University of Silesia, Katowice, Poland

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Kjell Oberg Department of Endocrine Oncology, University Hospital, Uppsala, Sweden

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Beata Kos-Kudla Department of Endocrinology and Neuroendocrine Tumours, Medical University of Silesia, Katowice, Poland

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. Cohorts The study cohort comprised 258 NENs, including gastroenteropancreatic (GEP) NENs ( n = 215): pancreatic, PNENs, n = 67; small intestine (midgut), SINENs, n = 40; rectal, RNENs, n = 45; gastric, GNENs, n = 44; appendiceal, ANENs, n = 10

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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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) that were diagnosed with SI-NET and operated upon in Uppsala University Hospital. Twenty-three primary tumors, 21 mesenteric, 6 liver, and 1 extramesenteric lymph node metastases and 3 ‘normal’ small intestine tissue specimens were analyzed. Informed

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

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duodenum ( 15 ). And in the same year, Fleig described how blood from an isolated loop of the small intestine, into which acid was injected, increased bile-flow when transfused into another dog ( 16 ). Thus, already 1 year after Bayliss’ and Starling

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Roxanne C S van Adrichem Department of Internal Medicine, Sector of Endocrinology, ENETS Centre of Excellence for Neuroendocrine Tumors, Erasmus MC, Rotterdam, The Netherlands

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Aart Jan van der Lely Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands

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Martin Huisman Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands

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Piet Kramer Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands

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Richard A Feelders Department of Internal Medicine, Sector of Endocrinology, ENETS Centre of Excellence for Neuroendocrine Tumors, Erasmus MC, Rotterdam, The Netherlands

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Patric J D Delhanty Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands

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Wouter W de Herder Department of Internal Medicine, Sector of Endocrinology, ENETS Centre of Excellence for Neuroendocrine Tumors, Erasmus MC, Rotterdam, The Netherlands

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. The primary NETs were originating from the small intestine, pancreas, stomach, lung, or had an unknown origin. Patients were eligible for the study if they were medical treatment naive, were not obese, and had neither metabolic syndrome nor diabetes

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