TY - JOUR TI - Colorectal Neuroendocrine Neoplasms: Areas of Unmet Need AU - Ramage, John K. AU - Valle, Juan W. AU - van Dijkum, Els J. M. Nieveen and AU - Sundin, Anders AU - Pascher, Andreas AU - Couvelard, Anne AU - Kloeppel, AU - Guenter AU - Bartsch, Detlef AU - Arnold, Rudolf AU - Baudin, Eric and AU - Bodei, Lisa AU - Borbath, Iva AU - Capdevila, Jaume AU - Caplin, Matyn and AU - Chen, Jie AU - Costa, Frederico AU - Couvelard, Anne AU - Cwikla, Jaroslaw AU - B. AU - Davies, Philippa AU - de Herder, Wouter W. AU - Falconi, Massimo AU - and Falkerby, Jenny AU - Fazio, Nicola AU - Ferone, Diego AU - Frilling, AU - Andrea AU - Garcia-Carbonero, Rocio AU - Glasberg, Simona AU - Gorbunova, AU - Vera AU - Grossman, Ashley AU - Hoersch, Dieter AU - Jensen, Robert and AU - Kaltsas, Gregory AU - Kloeppel, Guenter AU - Kingge, Ulrich Peter and AU - Kos-Kudla, Beata AU - Krejs, Guenter J. AU - Krenning, Eric AU - Kulke, AU - Matthew AU - Lamberts, Steven W. J. AU - Van Dijkum, Nieveen Els J. M. and AU - O'Connor, Juan Manuel AU - O'Toole, Dermot AU - Pape, Ulrich-Frank and AU - Partelli, Stefano AU - Pavel, Marianne Ellen AU - Peeters, Marc and AU - Ramage, John K. AU - Reed, Nicholas Simon AU - Rindi, Guido AU - Rinke, AU - Anja AU - Ruszniewski, Philippe AU - Sorbye, Halfdan AU - Sundin, Anders AU - and Scoazec, Jean-Yves AU - Taal, Babs G. AU - Janson, Tiensuu Eva and AU - Toumpanakis, Christos AU - Valle, Juan W. AU - Vullierme, Marie-Pierre and AU - Staffan, Welin AU - Wiedenmann, Bertman AU - ENETS 2016 Munich Advisory AU - Board JO - ISRN Neuroendocrinology PY - 2019 VL - 108 TODO - 1 SP - 45-53 PB - Karger SN - 2090-7982 TODO - 10.1159/000493767 TODO - Carcinoid tumours; Gastroenteropancreatic neuroendocrine tumours; Neuroendocrine tumour; Somatostatin receptor TODO - The subject of colorectal neuroendocrine neoplasms (NENs), subdivided into well-differentiated NENs, termed neuroendocrine tumours (NETs; grade (G) 1 and 2), and poorly differentiated NENs, termed neuroendocrine carcinomas (NECs; G3) according to the 2010 World Health Organisation (WHO) classification, has arguably not had as much attention or study as NENs occurring in other sites. Colorectal NETs and NECs are however easier to study than many others since they are usually not difficult to remove and are increasingly detected because of intensified colorectal cancer screening and surveillance programmes. Colorectal NETs and NECs show site-specific heterogeneity with variable behaviour and different therapeutic options; these various aspects provide unique challenges. Because of bowel cancer screening programmes, colorectal NENs, like conventional adenocarcinomas, may be diagnosed at a stage that is associated with improved survival. In this article we intend to describe and define areas of unmet needs relating to the epidemiology, classification, pathology, diagnosis and therapy of colorectal NETs (including NETs G3), colorectal NECs, and finally, mixed adeno-neuroendocrine carcinomas (MANECs) by reviewing and discussing the relevant literature. ER -