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). In the gastrointestinal and pancreatobiliary tracts, NEN are divided into well differentiated neuroendocrine tumors (NET) and poorly differentiated neuroendocrine carcinomas (NEC). NET are classified as G1, G2, and G3 based on tumor proliferation
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Departments of Nuclear Medicine and Endocrine Tumors, Digestive Oncology, Medical Oncology (Thoracic Group), Pathology, Radiology, Centre Antoine Lacassagne, Department of Urologic Oncology, Department of Endocrinology, Department of Biostatistics and Epidemiology, Faculté de Médecine, Gustave Roussy, 114 Rue Edouard Vaillant, F-94800 Villejuif Cedex, France
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Departments of Nuclear Medicine and Endocrine Tumors, Digestive Oncology, Medical Oncology (Thoracic Group), Pathology, Radiology, Centre Antoine Lacassagne, Department of Urologic Oncology, Department of Endocrinology, Department of Biostatistics and Epidemiology, Faculté de Médecine, Gustave Roussy, 114 Rue Edouard Vaillant, F-94800 Villejuif Cedex, France
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exhibit a very heterogeneous prognosis. Pathological differentiation or grading and TNM stage are the most important prognostic factors ( Baudin 2007 ). Poorly differentiated neuroendocrine carcinomas (NECs) are characterized by a poorer outcome when
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Laboratoire GReD, Université Clermont Auvergne, Clermont-Ferrand, France
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Faculté de Médecine, Université Paris Saclay, Le Kremlin-Bicêtre, France
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Faculté de Médecine, Université Paris Saclay, Le Kremlin-Bicêtre, France
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Introduction Neuroendocrine carcinomas (NECs) are highly malignant diseases, which can occur in all organs and are defined by a poorly differentiated morphology and high proliferative capacities testified by a high Ki-67 index ( Rindi et al
Department of Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
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National Hospital Organization, Sendai Medical Center, Sendai, Japan
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Introduction Pulmonary neuroendocrine tumors, as defined in the 2015 classification of the World Health Organization (WHO), comprise three different types; carcinoid tumors, large cell neuroendocrine carcinomas (LCNEC) and small-cell lung
Department of Oncology and Hemato-Oncology (DIPO), University of Milan, Milan, Italy
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Department of Oncology and Hemato-Oncology (DIPO), University of Milan, Milan, Italy
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Division of Gynecologic Surgery, European Institute of Oncology, IRCCS, Via Ripamonti, Milan, Italy
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Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
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Introduction High-grade neuroendocrine carcinoma of the cervix (NECC) is a rare subtype of invasive cervical carcinoma, accounting for 1.4% of all cases of cervical carcinoma and displaying an extremely aggressive biological behavior, with a
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-differentiated high-grade neuroendocrine tumors (G3 NET) and poorly differentiated high-grade neuroendocrine carcinomas (NECs). Most available literature does not account for this subcategorization and as a result, much of the management of high-grade NENs is based on
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Introduction High-grade (or poorly differentiated) gastroenteropancreatic (GEP) neuroendocrine carcinomas (NECs) are aggressive cancers with a high propensity for distant metastases. Like the more frequent pulmonary counterparts, they have
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as neuroendocrine carcinoma (NEC). There is an inverse correlation between overall survival (OS) and tumor grade, with HG NEC having the worst prognosis among GEP-NEN subtypes ( Klimstra et al. 2019 ). GEP-NECs have an aggressive natural history
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a Ki-67 index ranging from 20 to 55% and those with a Ki-67 index above 55%. According to the current World Health Organization (WHO) 2010 Classification, neuroendocrine carcinoma (NEC) is defined by both a poorly differentiated morphology (large
Division of Cancer Sciences, University of Manchester, Manchester, UK
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Université Paris Sud, Faculté de Médecine de Bicêtre, Le Kremlin-Bicêtre, France
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Introduction High grade neuroendocrine carcinomas (NECs) are usually defined by the combination of a poorly differentiated tumour cell morphology and evidence of high proliferative activity, evaluated either directly through the mitotic index