Abstract library

2002 results for "endocrine tumor of the appendix".
#106 Gastroenteropancreatic neuroendocrine tumors: single institution clinicopathological study
Introduction: Neuroendocrine cells are widely distributed throughout the body, and neoplasms from these dispersed cells can arise at many sites. They are distinguished into two broad categories: 1) Tumors identified as small cell lung carcinomas with biology and natural history of a high-grade malignancy and characteristics of small cell undifferentiated or anaplastic appearance by light microscopy. The WHO categorizes these tumors as poorly-differentiated neuroendocrine carcinomas; 2) Well-defined neuroendocrine tumors (NETs) with variable, but most lyindolent biologic behavior and characteristic well-differentiated histologic features. The majority arise in the gastrointestinal tract and collectively they are referred as gastroenteropancreatic neuroendocrine tumors (GEP/NETs). They include carcinoid tumors, pancreatic islet cell tumors (gastrinoma, insulinoma, glucagonoma, VIPoma, somatostatinoma), paragangliomas, pheochromocytomas, and medullary thyroid carcinomas. The WHO classifies the GEP/NETs as well-differentiated NETs (carcinoid tumors) if they are noninvasive and have benign behavior or uncertain malignant potential. In contrast, GEP/NETs with characteristics of low-grade malignancy with invasion of the muscularis propria or beyond, or metastases, are characterized as well-differentiated neuroendocrine carcinomas (malignant carcinoids). Pancreatic islet cell tumors, whether functioning or not, are classified as well-differentiated NETs or well-differentiated neuroendocrine carcinomas, due to the (depending on) histologic characteristics. The WHO classification for gastroenteropancreatic NETs based on stage (ie size and presence of metastases) and grade (mitotic rate, perineural and lymphovascular invasion, Ki-67 proliferative index) categorizes them as well-differentiated NETs, e.g., carcinoid tumors, or as well-differentiated neuroendocrine carcinomas.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Michael M. Vaslamatzis
#117 Synchronous appendiceal neuroendocrine carcinoma and mucinous cystadenocarcinoma: a case report
Introduction: Appendiceal tumors with histological features of both carcinoids and adenocarcinomas are very rare. Carcinomas of the appendix are usually mucinous adenocarcinomas with a tendency to produce peritoneal pseudomyxoma and without metastatic spread until late in the disease course. Carcinoid tumors of the appendix are a common incidental finding.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Sanja Ognjanovic
#141 Incidence of second primary tumors in patients with neuroendocrine tumors
Introduction: Based on epidemiological data from SEER 1950-1999, 22.4% cases of non-carcinoid second primary tumors have been described in patients diagnosed with neuroendocrine tumors. The incidence of this type of tumors varies, depending on the series assessed.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: MD Juan Manuel OConnor
Authors: Pesce V, OConnor J, Mendez G, Bestani C, ...
#194 Pancreatic Neuroendocrine Tumors: Experience of Endocrinology Department of the University Hospital of Coimbra
Introduction: Pancreatic neuroendocrine tumors (PNETs) are uncommon neoplasms, comprising 1-2% of all pancreatic tumors. The majority are nonfunctional. Of the functional tumors, insulinomas are the most common.
Conference: 8th Annual ENETS Conference (2011)
Category: Clinical
Presenting Author: Dr Alexandra Vieira
Authors: Vieira A, Santos J, Gomes L, Moreira A, ...
#328 Report of Two First-Degree Relatives with Appendix Carcinoid and Review of the Literature
Introduction: Appendix endocrine tumors have an incidence of 2-3 patient/millon/year. They are more common in women, diagnosed incidentally during appendectomies.
Conference: 8th Annual ENETS Conference (2011)
Category: Clinical
Presenting Author: Claudia Bestani
#867 Mixed Adenoneuroendocrine Carcinoma (MANECs): A Rare and Challenging Subgroup of Neuroendocrine Neoplasia
Introduction: Mixed Adenoneuroendocrine Carcinomas (MANECs) are rare entities in which at least 30% of neoplastic cells are neuroendocrine in nature (WHO 2010 classification). They result either from two independent lesions that merge together or are unique lesions with different cell populations intermingled.
Conference: 11th Annual ENETS Conference (2014)
Category: Pathology, grading, staging
Presenting Author: Dr Conor Mosli Lynch
#995 Neuroendocrine Tumor of the Appendix in Pregnancy
Introduction: Despite the fact the appendix is one of the rarest anatomical locations of neuroendocrine tumors (NETs) in the digestive system, the appendicular neuroendocrine tumor (A-NET) remains one of the most common tumors of the appendix.
Conference: 11th Annual ENETS Conference (2014)
Category: Clinical cases/reports
Presenting Author: Andrejs Vanags
Authors: Vanags A, Simtniece Z, Strumfa I, ...
#1152 Appendiceal Neuroendocrine Tumor: Correlation Between Histopathological Factors
Introduction: Neuroendocrine tumours (NET) of the appendix are rare histopathological neoplasm’s detected following operation for appendicitis. Clinical decisions focuses on different pathological factors for further management. With the aim of defining contemporary patterns of care in surgical practice, a critical review of the records is carried to establish a correlation between different histopathological parameters
Conference: 12th Annual ENETS Conference (2015)
Category: ...none of the below
Presenting Author: Senior Fellow Hany Nada
#1406 Collision Tumor of the Appendix: Mucinous Cystadenoma and Carcinoid. A Case Report
Introduction: Mucinous cystadenoma is the most common of benign neoplasms of the appendix and carcinoid is the most common type of primary malignant lesions of the appendix.
Conference: 13th Annual ENETS conference (2016)
Category: Clinical cases/reports
Presenting Author: Juan Manuel O'Connor
#2015 Single-Institutional Review of Non-Pancreatic GI Neuroendocrine Tumors
Introduction: Neuroendocrine tumors (NETs) most commonly occur in the digestive tract with an incidence of 3.56 per 100,000 with 94% of those being non pancreatic.
Conference: 15th Annual ENETS conference (2018)
Category: Epidemiology/Natural history/Prognosis- Registries, nationwide and regional surveys
Presenting Author: M.D. Alaa El Chami