Abstract library

1915 results for "Small intestine neuroendocrine tumors".
#20 Paraneoplastic antigen Ma2 (PNMA2) auto-antibodies as biomarkers for early small intestine neuroendocrine tumors detection
Introduction: Small intestine neuroendocrine tumors (NETs) comprise well-differentiated NET (benign carcinoid), well-differentiated neuroendocrine carcinoma (malignant carcinoid) and poorly differentiated neuroendocrine carcinoma (NEC). The majority of NET patients have developed liver metastases at the time of diagnosis and surgery is then seldom curative. Novel predictive, diagnostic and prognostic markers are thus needed to improve our capabilities to diagnose and cure these tumors. We have previously identified six novel marker genes for neuroendocrine tumor cells by using Affymetrix microarrays and advanced bioinformatics. One of this markers, the paraneoplastic antigen Ma2 (PNMA2), which is normally expressed only in nervous tissue, can in the process of carcinogenesis be detected in tumors located outside the nervous system. The finding that Ma2 is expressed in small intestine neuroendocrine primary tumors and their metastases made it interesting to screen whether antibodies against Ma2 are present in the serum of NET patients.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: PhD Valeria Giandomenico
Authors: Cui T, Elgue G, Li S C, Hurtig M, ...
#47 Plasma CCN2/connective tissue growth factor is associated with right ventricular dysfunction in Patients with Neuroendocrine Tumors
Introduction: Carcinoid heart disease (CHD) is a known complication of neuroendocrine tumors (NETs), particularly of those arising from the small intestine, appendix and proximal colon (previously known as mid-gut carcinoids). CHD is characterized by right heart fibrotic lesions and has traditionally been defined by the degree of valvular involvement, most commonly in the form of tricuspid regurgitation. Right ventricular (RV) dysfunction due to mural involvement may also be a manifestation. Connective tissue growth factor (CCN2) is upregulated in many fibrotic disorders. Increased tumor expression of CCN2 has been shown in patients with small intestinal NETs associated with peritoneal fibrosis. At present, its role in carcinoid heart disease is unknown.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr. Deidi S Bergestuen
#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
#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, ...
#159 Detection of cardiac metastases in patients with neuroendocrine tumors: comparison of Ga-68 DOTA-SMS-R PET/CT, cardiac MRI, CT scan and 2D echocardiography
Introduction: Neuroendocrine tumor metastases to the heart have been sparsely reported in literature. There is as of yet no detailed study on the best imaging method for the detection of this rare site of metastases.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr. Vikas Prasad
Authors: Prasad V, Ali S, Secknus M A, Lauer B, ...
#193 Paraneoplastic Antigen Ma2 Autoantibodies as Specific Blood Biomarkers for Detection of Early Recurrence of Small Intestine Neuroendocrine Tumors
Introduction: Small intestine neuroendocrine tumors (SI-NETs) are rare fatal cancers. Many patients develop metastatis before diagnosis. There is no available curative treatment for patients with metastasis.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Associate Profes Valeria Giandomenico
Authors: Cui T, Hurtig M, Li S C, Veronesi G, ...
#200 Genome-Wide MicroRNA Expression in Small Intestine Neuroendocrine Tumors (“Midgut carcinoids”): Upregulation of miRNA-182, miRNA-183 and Downregulation of miRNA-215
Introduction: MicroRNAs (miRs) may regulate cell proliferation, differentiation, apoptosis and function as tumor suppressors or oncogenes. MiR expression is not characterized in neuroendocrine midgut carcinoids.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: PhD student Su-Chen Li
#316 Utilization of Gene Network Graph Topology with Inference Relevance Analysis Delineates G Protein-coupled Receptor Pathways and CREB Targets in Small Intestinal Neuroendocrine Neoplasia
Introduction: Despite an increasing incidence, a paucity of biological information has led to major limitations in identification of plausible therapeutic targets for small intestinal neuroendocrine tumors (SINETs)
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Dr Mark Kidd
#355 MicroRNA Signatures as Novel Biomarkers in Small Intestine Neuroendocrine Tumors
Introduction: Small intestine (SI) neuroendocrine tumors (NET) arise from serotonin-producing intraepithelial cells in the SI referred to as enterochromafin cells. The detection of SI-NETs is often concomitant with the appearance of hepatic metastasis thus most patients with SI-NET have metastases at initial presentation. MicroRNAs (miRs) are post-transcriptional key regulators in tumorigenesis which regulate expression of other genes. Little evidence of miR expression or deregulation in SI-NETs has been reported.
Conference:
Category: Basic
Presenting Author: Su-Chen Li
Authors: Li S C, Ahmed E, Martijn C, Lloyd R, ...
#424 Role of MicroRNAs in Small Intestine Neuroendocrine Tumors
Introduction: Small intestinal neuroendocrine tumors (SI-NETs) arise from enterochromaffin cells, which belong to the endocrine system. MicroRNAs (miRs) are post-transcriptional regulators. They control multiple biological processes often functioning either as tumor suppressor genes or oncogenes.
Conference: 9th Annual ENETS Conference (2012)
Category: Basic
Presenting Author: Su-Chen Li
Authors: Li S C, Martijn C, Essaghir A, Lloyd R, ...