The Immunohistochemical (IHC) Expression and Prognostic Value of ER, PR, and HER2/neu in Pancreatic and Small Intestinal Neuroendocrine Tumors Abstract #175

Introduction: There has been limited study of ER and PR expression in gastrointestinal neuroendocrine tumors (GINETs) and data on HER2/neu overexpression in GINETS has been conflicting.
Aim(s): To assess ER, PR and HER2/neu expression in a cohort of pancreatic and small intestinal NETS and to correlate findings with survival outcomes.
Materials and methods: We identified 77 patients with primary pancreatic (40) or small intestinal (37) NETs diagnosed from 1991 to 2009. Tissue microarrays were constructed and ER, PR, and HER2/neu were assessed via IHC according to current ASCO/CAP guidelines for breast cancer. Survival outcomes were ascertained by retrospective chart review.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Dr Daniel Rayson

To read results and conclusion, please login ...

Further abstracts you may be interested in

#174 Loss of Expression of the DNA Mismatch Repair Proteins MLH1 and MSH2 is Rare in Pancreatic and Small Intestinal Neuroendocrine Tumors
Introduction: Loss of expression of the DNA mismatch repair (MMR) proteins MLH1 and MSH2, which is known to correlate strongly with MSI, has not been well studied in pancreatic or small intestinal NETs.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Dr Daniel Rayson
Authors: Rayson D, Arnason T, Sapp H, Barnes P, ...
#2746 Immunohistochemical Biomarker Expression in Gastro-Entero-Pancreatic Neuroendocrine Tumors at ENETS Centre of Excellence, University Hospital Zurich, Switzerland
Introduction: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous tumor entity with respect to biological behaviour and prognosis. This makes diagnosis and treatment a major challenge.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Biomarkers
Presenting Author: Dr.med. Alexander Siebenhüner
#2810 Development of a Personalized Human Immunocompetent Ex-Vivo Model of Neuroendocrine Liver Metastasis Using Precision Cut Tissue Slice Technology
Introduction: Liver metastasis (LM) are very frequent (65-95%) and represent a crucial prognostic factor in patients with gastroenteropancreatic neuroendocrine neoplasms (GEP NENs). The paucity of relevant experimental models has limited the understanding of the pathophysiology of NENs and the development of efficient therapeutic strategies
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Basic Science - In vitro models, tumor growth, CTCs
Presenting Author: Ewald Doornebal
Authors: Doornebal E, Harris N, Miquel R, Zen Y, ...
#2712 HORMONET: Study of Tamoxifen in Well Differentiated Neuroendocrine Tumors (NET) and Hormone Receptor Positive Expression
Introduction: We have shown immunohistochemistry (IHC) expression of estrogen (ER) and progesterone receptors (PR) in 20.8% and 18.8% of 96 NET patients (pts). An old clinical trial (Mortel C, 1984) suggested antitumor effects of estrogen/progesterone-directed therapies in NET. Yet the effects of an antiestrogen agent in NET pts whose tumor express ER and/or PR are unknown.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Trials in Progress/Trials in Concept
Presenting Author: Prof Rachel Riechelmann
#2853 Succinate Dehydrogenase B (SDHB) Immunohistochemical Expression in Pancreatic Neuroendocrine Tumours and Correlation with Somatostatin Receptor Immunohistochemistry
Introduction: The established category of succinate dehydrogenase (SDH) deficient neoplasms includes several endocrine tumours with recent evidence that pancreatic neuroendocrine tumours (PNETs) could be included in this tumour group. The SDH complex is composed of four subunits (A-D) but loss of immunohistochemical (IHC) expression for SDHB indicates bi-allelic inactivation of any SDH component and is used as a marker for syndromic disease.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Pathology - grading, staging
Presenting Author: Dr. Niall Swan
Authors: Swan N, Nadeem N, Crowley R, ...