Abstract library

60 results for "urinary 5HIAA".
#22 A Case Illustrative of Phenotypic Heterogeneity and Challenges in the Management of Paraganglioma
Introduction: Paragangliomas (PGLs) are extra-adrenal, usually benign, highly vascularized tumors that originate from neural-crest-derived chromaffin cells. These tumors are subdivided as either sympathetic or parasympathetic, depending on their location and catecholamine production. Sympathetic PGLs are situated along the abdominal sympathetic trunk and usually produce catecholamines, whereas parasympathetic PGLs are located in the head and neck, and these usually do not produce catecholamines. PGLs may present as sporadic or inherited tumor syndrome, including MEN 2, with RET germline mutations, von Hippel-Lindau (VHL) disease due to germline mutations in VHL gene, and pheochromocytoma-PGL syndrome. The latter is frequently a hereditary condition and is caused by germline mutations in the SDHB, SDHC, or SDHC genes. Patients with familial PGLs may present at a younger age, often as multifocal tumors, with an increased risk of recurrence and a higher frequency of malignancy in those with SDHB mutations. SDH mutations induce angiogenesis and tumorogenesis through the inhibition of hypoxia-inducible factors (HIF)-propyl hyroxylase. A younger age at onset, malignancy, and a positive family history are clinical parameters of high specificity, but low sensitivity for diagnosis. Genetic analysis for mutations in SDH genes for the patient and family members, and surveillance for the affected patient and family members, are necessary where there are no clear clinical or family indicators for the syndrome. We present a case of a large abdominal malignant PGL in a 20-year-old pt. that went on without clinical detection for at least three years.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Mohammed Ahmed
#1917 Clinical Correlates of Discrepant Results of Chromogranin a versus Serotonin Markers in Patients with Neuroendocrine Tumors
Introduction: Neuroendocrine tumors lead to elevated chromogranin A levels and elevated serotonin markers (urinary 5HIAA and platelet serotonin). These markers are employed for diagnosis and monitoring.
Conference: 14th Annual ENETS conference (2017)
Category: Biomarkers
Presenting Author: Dr Wim Meijer
#595 A Single Fasting Plasma 5-HIAA Value Correlates with 24-Hour Urinary 5-HIAA Values and Other Biomarkers in Midgut Neuroendocrine Tumors (NETs)
Introduction: 5-hydoxyindoleacetic acid (5-HIAA) is used for the evaluation of neuroendocrine tumors (NETs), however, the current 5-HIAA assay requires a 24-hour urine collection which is inconvenient.
Conference: 10th Annual ENETS Conference (2013)
Category: Medical treatment - Chemotherapy
Presenting Author: Eugene Woltering
#925 Negative Urinary Fractionated Metanephrines and Elevated Urinary Vanillylmandelic Acid in a Patient with a Sympathetic Paravesical Paraganglioma
Introduction: Paragangliomas have hereditary and sporadic presentations.
Conference: 11th Annual ENETS Conference (2014)
Category: Clinical cases/reports
Presenting Author: Edwin A Wandurraga
Authors: Wandurraga E A, Marín L F, ...
#34 Plasma Chromogranin A(CgA) and Urinary 5 Hydroxy-indoleacetic acid(5-HIAA) use in monitoring somatostatin analogue(SSA) therapy at Newcastle NHS Foundation Trust
Introduction: Two main biochemical markers, plasma chromogranin A (CgA) and urinary 5 hydroxy-indoleacetic acid (5-HIAA) are used to aid staging and monitoring of patients with neuroendocrine (NET) tumors. Somatostatin analogues (SSA) such as octreotide and lanreotide have been used to alleviate symptoms and disease progression in NET patients. This study evaluates the use of CgA and 5HIAA in monitoring NET patients on SSA therapy at Newcastle NHS Foundation Trust.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Andy James
Authors: Teo L, Hearn K, Bernstone G, Wright R, ...
#872 Urinary 5-hydroxyindoleacetic Acid In Serotonin-Producing Neuroendocrine Tumors: Correlation with Disease Features and Patients' Survival
Introduction: Urinary 5-hydroxyindoleacetic acid (U-5HIAA) is a useful marker for serotonin-producing neuroendocrine tumors (NETs). Its prognostic role, however, is yet to be fully elucidated.
Conference: 11th Annual ENETS Conference (2014)
Category: Biomarkers
Presenting Author: Theo K Bartholomew
#1068 Telotristat Etiprate in a Subset of Carcinoid Syndrome Patients Who Have High Levels of Urinary 5-hydroxyindoleacetic Acid and Frequent Flushing
Introduction: Serotonin is a key mediator of carcinoid syndrome (CS). CS patients (pts) with high levels of urinary 5-hydroxyindoleacetic acid (u5-HIAA, a serotonin metabolite) and >3 flushing episodes/day are at increased risk of developing carcinoid heart disease (CaHD).
Conference: 12th Annual ENETS Conference (2015)
Category: Medical treatment - Others
Presenting Author: Darren Wheeler
#1640 SDHB Mutation in a Young Patient with a Metastatic Paraganglioma of the Urinary Bladder
Introduction: Paragangliomas are rare tumors that arise from the sympathetic and parasympathetic ganglia that can possess an inherited trait.
Conference: 14th Annual ENETS conference (2017)
Category: Clinical cases/reports
Presenting Author: MD Ioana Maria Lambrescu
Authors: Lambrescu I M, Cima L, Leca B, Martin S, ...
#2219 24 Hour Urinary 5-Hydroxyindoleacetic Acid Levels in Patients with Non-Functioning Pancreatic Neuroendocrine Tumors
Introduction: The secretion of urinary 5-Hydroxyindoleacetic Acid (u5-HIAA) by non-functioning PNETs (NF-PNET) has rarely been reported, and the data on the association between u5-HIAA levels and disease burden is scant.
Conference: 15th Annual ENETS conference (2018)
Category: Biomarkers
Presenting Author: Dr Amit Tirosh
#1517 Additional Value for Urinary 5-Hydroxyindoleacetic Acid as Prognostic Marker in Neuroendocrine Tumors?
Introduction: 5-Hydroxyindoleacetic Acid (5-HIAA) is of value for diagnosis of NETs and correlates with severity of carcinoid syndrome. However its value for determining prognosis is uncertain, particularly in combination with other biomarkers
Conference: 13th Annual ENETS conference (2016)
Category: Epidemiology/Natural history/Prognosis - Prognosis
Presenting Author: Wouter Zandee
Keywords: prognosis 5-HIAA