Abstract library

51 results for "specificity".
#1740 A Nomogram Consisted of Routine Biochemical Tests May Increase the Diagnostic Accuracy of Chromogranin A in Detecting Patients with Neuroendocrine Tumors
Introduction: Serum chromogranin A (CgA) may be falsley increased in patients with renal impairment and systemic inflammation.
Conference: 14th Annual ENETS conference (2017)
Category: Biomarkers
Presenting Author: MD, PhD Ivan Kruljac
#484 Diagnostic Accuracy of Gallium-68 Somatostatin Receptor Positron Emission Tomography in Patients with Thoracic and Gastroenteropancreatic Neuroendocrine Tumors: A Meta-Analysis
Introduction: Gallium-68 somatostatin receptor (SMSR) positron emission tomography (PET) is a valuable diagnostic tool for patients with neuroendocrine tumors (NET). To date, a meta-analysis about the diagnostic accuracy of this functional imaging method is lacking.
Conference: 9th Annual ENETS Conference (2012)
Category: Clinical
Presenting Author: Dr. Giorgio Treglia
#17 Diagnostic efficacy of the secretin stimulation test for the Zollinger-Ellison syndrome: an intra-individual comparison using different dosages in patients and controls
Introduction: The diagnosis of Zollinger-Ellison syndrome is suspected in patients with symptoms of gastric acid hypersecretion, i.e., peptic ulcer disease, malabsorption or diarrhea, or with elevated fasting serum gastrin levels. However, symptoms can be masked by the use of proton pump inhibitors and fasting serum gastrin values are not always conclusive. Therefore, the secretin stimulation test is advocated as the principal diagnostic tool to identify the Zollinger-Ellison syndrome.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Patricia Kuiper
#53 The rise and fall of chromogranin A as an indicator for NET
Introduction: There is now general awareness that treatment with proton pump inhibitors (ppi) may cause moderate rises in circulating concentrations of gastrin and/or chromogranin A (CgA), thus decreasing the specificity of these markers in the diagnosis of neuroendocrine tumors (NETs). Due to their high efficacy, proton pump inhibitors (ppi) are one of the most frequently prescribed classes of drugs worldwide. Several studies in various countries report that 30% or more of in-patients have been prescribed ppi. Patients who are suspected of having a neuroendocrine tumor (NET) often have gastrointestinal (GI) symptoms for which ppi are prescribed and therefore they may be already taking ppi when their first blood sample is assayed for NET markers. We previously encountered a case of extreme rise in CgA which flagged the possibility of a NET, but was later shown to be due to ppi therapy alone. We present CgA and gastrin data in relation to ppi therapy and withdrawal for this patient. In order to see if this was an isolated incident, we audited all laboratory requests for CgA/gastrin in a two-year period and monitored those that provided details of ppi treatment/withdrawal.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Lee Armstrong
Authors: Armstrong L, Ryan K, Ardill J, ...
#105 A pilot study using biochemical markers to predict acrcinoid heart disease in patients with carcinoid disease
Introduction: Carcinoid heart disease (CHD) affects up to 15-70% of patients with carcinoid disease. Recent ENETS guidelines recommend regular echocardiographic assessment to screen for CHD. Chromogranin A (CgA) is a peptide widely used to monitor carcinoid disease progression. Neurokinin A is a tachykinin which may be a more sensitive measure of carcinoid disease progression and prognosis. N-terminal pro Brain Naturetic Peptide is used as a screening tool for heart failure and recent results suggest utility in the diagnosis of CHD.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Christopher Wong
#152 Validation of a new assay that uses 2 monoclonal antibodies to measure intact and fragmented plasma CgA levels
Introduction: Plasma chromogranin A (CgA) levels are elevated in a variety of neuroendocrine tumors (NETs) and are used to aid in diagnosis, prognosis, and monitoring of treatment effects in NETs patients. We evaluated a newer sandwich ELISA assay (Cisbio US, Bedford, MA, USA) that utilizes two monoclonal antibodies that bind to the mid-region of the CgA protein and allow measurement of intact and fragmented circulating CgA. The results from the assay validation indicative of its overall robustness in terms of sensitivity, specificity, reproducibility, and stability are presented here.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Monica Motwani
#583 Olfactory Receptor 51E1 is a Potential Novel Tissue Biomarker for the Diagnosis and Prognosis of Small Intestine Neuroendocrine Tumors
Introduction: Small intestine neuroendocrine tumor (SI-NET) patients get late diagnosis. We reported olfactory receptor 51E1 (OR51E1) as a SI-NET-mRNA marker.
Conference:
Category: Basic
Presenting Author: Mr TAO CUI
#1074 Usefulness of a Combination of a 48-Hour Fasting and a Glucagon Tolerance Test
Introduction: The 72-hour fasting test is the gold standard for the diagnosis of insulinoma. However, the test can become a burden for both patients and medical staff and, shortening the duration of fast has been attempted. There are several reports on the high sensitivity of fasting test but only a few reports on its specificity. An insulinoma can be localized using invasive tests such as endoscopic ultrasonography and selective arterial secretagogue injection test. Therefore, insulinoma detection with high specificity may be needed to avoid unnecessary examinations.
Conference: 12th Annual ENETS Conference (2015)
Category: ...none of the below
Presenting Author: Keijiro Ueda
Authors: Ueda K, Lee L, Hijioka M, Igarashi H, ...
#1077 Signs of Carcinoid Heart Disease on Staging CT: Which Predictors are Helpful?
Introduction: In patients with functionally active neueroendocrine neoplasms (NEN) carcinoid heart disease presenting primarily with tricuspid valve regurgitation (TR) is associated with high morbidity and mortality. Early diagnosis is crucial to improve prognosis.
Conference: 12th Annual ENETS Conference (2015)
Category: Imaging (radiology, nuclear medicine, endoscopy)
Presenting Author: Dr. med. Alexander Baur
Authors: Baur A, Kunz F, Pschowski R, Röpke T, ...
#1485 Validation of a Blood Neuroendocrine Tumor Gene Signature, the NETest, in a Netherlands NET Cohort
Introduction: The CgA has limitations as a monoanalyte biomarker. The introduction of a PCR-based multi-analyte analysis of 51 genes (NETest) has been proposed as more accurate.
Conference: 13th Annual ENETS conference (2016)
Category: Biomarkers
Presenting Author: Dr Margot Tesselaar
Authors: Tesselaar M, Korse T, Kidd M, Verbeek W, ...
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