Abstract library

386 results for "surrogate marker".
#67 Interest of combined chromogranin A and pancreatic polypeptide for diagnosis and follow-up of gastroenteropancreatic endocrine carcinoma
Introduction: Assessment of tumor burden changes is essential for the management of well-differentiated gastroenteropancreatic neuroendocrine carcinoma (GEPNET). Chromogranin A (CgA) is the principal tumor marker for such tumors; however, its use to evaluate morphological tumor progression is not validated. Combined CgA and pancreatic polypeptide (PP) may increase sensitivity in the diagnosis of GEP-NET.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: Dr Thomas WALTER
#29 Serum chromogranin A correlation with tumor burden in metastatic small bowel carcinoid patients
Introduction: Patients with neuroendocrine tumors may have clinical courses that range from fairly indolent to more aggressive. Cross–sectional studies, nuclear imaging and biochemical markers are often used to monitor disease progression. Optimal surveillance tests and intervals have not been firmly established. Studies suggest that chromogranin A (CgA) may be a surrogate marker for tumor burden.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Mr. Thomas Curran
#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, ...
#473 Succinate Dehydrogenase (SDHB): A New Marker of Malignancy in Midgut Carcinoids?
Introduction: The immunoistochemical (IHC) loss of SDHB expression was reported as a surrogate marker of malignancy in sporadic and familial pheocromocytomas/paragangliomas. SDHB loss is supposed to be tumorigenic (activation hypoxia signals).
Conference: 9th Annual ENETS Conference (2012)
Category: Basic
Presenting Author: MD Sara Pusceddu
Keywords: SDHB
#581 Loss of Succinate Dehydrogenase (SDHB) Expression in Midgut Carcinoids as Prognostic Factor: a New Marker of Personalized Cancer Medicine in Neuroendocrine Tumors?
Introduction: Gene mutations of SDH complex have been involved in the pathogenesis of cancer cells. These mutations are often associated with loss of activity of SDH subunity B and overexpression of HIF-1a, which play a central role in angiogenesis.
Conference:
Category: Basic
Presenting Author: Dr. Massimo Milione
#344 Cell Cycle Phase Expression Profile Guided Selection of Proliferative Markers for Well-differentiated Small Intestinal Neuroendocrine Neoplasms
Introduction: Grading of neuroendocrine lesions is often determined by Ki-67 (immunostain), despite limited prognostic ability for this cell cycle marker in well-differentiated tumors (WDNETs) and carcinomas.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Dr Mark Kidd
Authors: Lawrence B, Kidd M, Alaimo D, Svejda B, ...
#491 International Survey for the Use of Biomarkers and Molecular Imaging in Neuroendocrine Tumors (NET): What we are Using in Daily Practice
Introduction: Several guidelines have given recommendations for optimal use of biomarkers and molecular imaging. However, those guidelines’ implementation may not be always possible due to local policies or lack of access to several diagnostic studies.
Conference: 9th Annual ENETS Conference (2012)
Category: Clinical
Presenting Author: DR CHRISTOS Toumpanakis
#682 Neuroendocrine Tumors, Searching for New Prognostic Biomarkers
Introduction: Neuroendocrine tumors (NET) of the digestive system were once considered relatively rare, however, the incidence is increasing. New prognostic biomarkers are needed for assessment of tumor behavior to inform patient treatment and improve outcome. The proliferation marker, Ki-67, is used for NET grading. Although classified as low grade, some tumors actually develop metastases.
Conference: 10th Annual ENETS Conference (2013)
Category: Biomarkers
Presenting Author: Helen Miller
#246 SDHB Loss Predicts Malignancy in Pheochromocytomas/Sympathethic Paragangliomas, but Not Through Hypoxia Signalling
Introduction: To date there is no reliable histopathological marker of malignancy for pheochromocytomas/sympathetic paragangliomas (PCC/PGL). It is well-known that PCC/PGL in the hereditary context of an SDHB germline mutation very often metastasize. The immunohistochemical loss of SDHB expression was recently shown to be a surrogate marker for the presence of an SDH germline mutation in PCC/PGL. SDHB loss is supposed to be tumorigenic via activation of hypoxia signals.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Dr Anja M Schmitt
#309 The Utility of Alpha Internexin as a Predictive Tissue Biomarker for Proliferation in Gastrointestinal and Pancreatic Neuroendocrine Tumors
Introduction: GEP-NETs are increasing but Ki-67 and CgA provide limited information regarding malignancy. A key unmet need is alternative biomarkers to assess the likelihood of local invasion or metastasis.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Dr Mark Kidd
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