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Neuroendocrine tumor

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https://www.readbyqxmd.com/read/28728148/the-role-of-cytotoxic-chemotherapy-in-advanced-pancreatic-neuroendocrine-tumors
#1
Sebastian Krug, Thomas M Gress, Patrick Michl, Anja Rinke
BACKGROUND: Pancreatic neuroendocrine tumors (PNETs) are rare neoplasms accounting for less than 5% of all pancreatic malignancies. These tumors are characterized by clinical and prognostical heterogeneity and are predominantly diagnosed in a metastatic stage. Cytotoxic chemotherapy, along with alkylating agents and antimetabolites as well as molecular targeted agents (everolimus, sunitinib), is used in the treatment of advanced PNETs. After the approval of lanreotide for unresectable PNETs, an additional therapeutic option has become available; however, the best sequence of therapies and patient stratification to different treatments remains challenging...
July 21, 2017: Digestion
https://www.readbyqxmd.com/read/28726181/ki-67-heterogeneity-in-well-differentiated-gastro-entero-pancreatic-neuroendocrine-tumors-when-is-biopsy-reliable-for-grade-assessment
#2
Grillo Federica, Valle Luca, Ferone Diego, Albertelli Manuela, Brisigotti Maria Pia, Cittadini Giuseppe, Vanoli Alessandro, Fiocca Roberto, Mastracci Luca
PURPOSE: Ki-67 heterogeneity can impact on gastroenteropancreatic neuroendocrine tumor grade assignment, especially when tissue is scarce. This work is aimed at devising adequacy criteria for grade assessment in biopsy specimens. METHOD: To analyze the impact of biopsy size on reliability, 360 virtual biopsies of different thickness and lengths were constructed. Furthermore, to estimate the mean amount of non-neoplastic tissue component present in biopsies, 28 real biopsies were collected, the non-neoplastic components (fibrosis and inflammation) quantified and the effective area of neoplastic tissue calculated for each biopsy...
July 19, 2017: Endocrine
https://www.readbyqxmd.com/read/28724304/synchronous-intraductal-papillary-mucinous-neoplasm-and-a-pancreatic-neuroendocrine-tumor-more-than-a-coincidence
#3
Juliana M Costa, Sofia Carvalho, João B Soares
Although the association between intraductal papillary mucinous neoplasm of the pancreas (IPMN) and pancreatic neuroendocrine tumor (PNET) has been increasingly reported, whether this association is real or coincidence remains unclear. We report a case of synchronous IPMN and a PNET which were diagnosed preoperatively and discuss the tumorigenesis, clinicopathological features and management of these rare tumors based on the published literature. A 56-year-old male was incidentally diagnosed with a 14 mm branch duct IPMN and a 3...
July 14, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28723135/development-of-dual-aptamers-for-constructing-sandwich-type-pancreatic-polypeptide-assay
#4
Shiya Qin, Nandi Chen, Xiaohai Yang, Qing Wang, Kemin Wang, Jin Huang, Jianbo Liu, Maogui Zhou
Pancreatic polypeptide (PP) is a specific biomarker of nonfunctional pancreatic neuroendocrine tumors (NF-pNETs). Clinical significance of PP inspires researchers to make great efforts in developing sensitive and specific sensors. However, there is no existing biosensor for detecting PP that combines facility and functionality. Addressing this challenge, a pair of aptamers which could be used to develop a sandwich assay for PP is reported. First, several high affinity aptamers are screened through graphene oxide-based SELEX, and appropriate dual-aptamers which could bind to different epitopes of PP are identified through fluorescence assays...
February 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28722702/radiofrequency-ablation-of-hepatic-tumor-subjective-assessment-of-the-perilesional-vascular-network-on-contrast-enhanced-computed-tomography-before-and-after-ablation-can-reliably-predict-the-risk-of-local-recurrence
#5
Sireesha Yedururi, Silanath Terpenning, Sanjay Gupta, Patricia Fox, Sooyoung Shin Martin, Claudius Conrad, Evelyne M Loyer
OBJECTIVE: To determine whether simple, subjective analysis of the perilesional vascular network can predict the risk of local recurrence after radiofrequency ablation (RFA) of liver malignancies on contrast-enhanced computed tomography (CECT). METHODS: Contrast-enhanced computed tomography's 103 patients (59 men and 44 women; mean age, 63 years (range, 31-84 years) with 134 lesions who underwent RFA between 2000 and 2010 were retrospectively analyzed. The primary tumors include colorectal carcinoma (58 patients), hepatocellular carcinoma (n = 13), breast carcinoma (n = 8), neuroendocrine tumor (n = 5), and others (n = 19)...
July 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28721067/phase-i-dose-escalation-study-of-long-acting-pasireotide-in-patients-with-neuroendocrine-tumors
#6
James C Yao, Jennifer A Chan, Alain C Mita, Madan G Kundu, Karina Hermosillo Reséndiz, Ke Hu, Shoba Ravichandran, Jonathan R Strosberg, Edward M Wolin
This phase I study aimed at determining the maximum tolerated dose (MTD) and characterizing the safety, tolerability, pharmacokinetics (PKs), and efficacy of pasireotide in patients with advanced neuroendocrine tumors (NETs). Patients were enrolled in two phases: dose-escalation phase (to determine the MTD) at a starting dose of 80 mg pasireotide long-acting release (LAR) i.m. followed by a dose-expansion phase (to evaluate safety and prelimi-nary efficacy). Associations between PK/pharmacodynamic parameters and clinical outcomes were evaluated using linear regression analysis...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28719469/insm1-demonstrates-superior-performance-to-the-individual-and-combined-use-of-synaptophysin-chromogranin-and-cd56-for-diagnosing-neuroendocrine-tumors-of-the-thoracic-cavity
#7
Lisa M Rooper, Rajni Sharma, Qing Kay Li, Peter B Illei, William H Westra
Despite the importance of recognizing neuroendocrine differentiation when diagnosing tumors of the thoracic cavity, the sensitivity of traditional neuroendocrine markers is suboptimal, particularly for high-grade neuroendocrine carcinomas such as small cell lung carcinoma and large cell neuroendocrine carcinoma. To increase sensitivity, neuroendocrine markers are routinely ordered as panels of multiple immunostains where any single positive marker is regarded as sufficient evidence of neuroendocrine differentiation...
July 17, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28719461/serotonin-atrx-and-daxx-expression-in-pituitary-adenomas-markers-in-the-differential-diagnosis-of-neuroendocrine-tumors-of-the-sellar-region
#8
Olivera Casar-Borota, Johan Botling, Dan Granberg, Jerker Stigare, Johan Wikström, Henning Bünsow Boldt, Bjarne Winther Kristensen, Fredrik Pontén, Jacqueline Trouillas
Differential diagnosis based on morphology and immunohistochemistry between a clinically nonfunctioning pituitary neuroendocrine tumor (NET)/pituitary adenoma and a primary or secondary NET of nonpituitary origin in the sellar region may be difficult. Serotonin, a frequently expressed marker in the NETs, has not been systematically evaluated in pituitary NETs. Although mutations in ATRX or DAXX have been reported in a significant proportion of pancreatic NETs, the mutational status of ATRX and DAXX and their possible pathogenetic role in pituitary NETs are unknown...
July 17, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28718084/pancreatic-neuroendocrine-tumor-producing-insulin-and-vasopressin
#9
Omalkhaire M Alshaikh, Ju-Yoon Yoon, Bryan A Chan, Monika K Krzyzanowska, Jagdish Butany, Sylvia L Asa, Shereen Ezzat
The objective of the study is to report a rare case of pancreatic neuroendocrine tumor (pNET) producing insulin and vasopressin. We describe the clinical presentation and management of a metastatic pNET with refractory hypoglycemia and progressive severe hyponatremia. A 52-year-old patient had abdominal pain leading to the diagnosis of a tumor that was initially presumed to be splenic in origin. Investigations ultimately identified a pancreatic mass that on biopsy proved to be a pNET. Eventually, he developed extensive liver metastases, and with tumor progression, he manifested hypoglycemia and severe hyponatremia...
July 17, 2017: Endocrine Pathology
https://www.readbyqxmd.com/read/28717741/patient-reported-burden-of-a-neuroendocrine-tumor-net-diagnosis-results-from-the-first-global-survey-of-patients-with-nets
#10
Simron Singh, Dan Granberg, Edward Wolin, Richard Warner, Maia Sissons, Teodora Kolarova, Grace Goldstein, Marianne Pavel, Kjell Öberg, John Leyden
PURPOSE: Despite the considerable impact of neuroendocrine tumors (NETs) on patients' daily lives, the journey of the patient with a NET has rarely been documented, with published data to date being limited to small qualitative studies. NETs are heterogeneous malignancies with nonspecific symptomology, leading to extensive health care use and diagnostic delays that affect survival. A large, international patient survey was conducted to increase understanding of the experience of the patient with a NET and identify unmet needs, with the aim of improving disease awareness and care worldwide...
February 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/28717527/vagal-paraganglioma-presenting-as-a-neck-mass-associated-with-cough-on-palpation
#11
Richard Heyes, Nizar Taki, Miriam A O'Leary
A 70-year-old female presented with a neck mass and sporadic dry cough, often leading to fits of coughing severe enough to cause vomiting. The patient reported that touching the mass triggered the cough. On examination, a 2.5 cm right-sided level two neck mass deep to the sternocleidomastoid was present. Palpation of the mass immediately triggered coughing. Cross-sectional imaging proposed vagal paraganglioma as the chief differential, which was confirmed following surgical excision. The patient reported complete resolution of her severe dry cough after surgery...
2017: Case Reports in Otolaryngology
https://www.readbyqxmd.com/read/28715719/isolated-caudate-lobectomy-left-sided-approach-case-reports
#12
Orlando Jorge M Torres, Rodrigo Rodrigues Vasques, Ozimo Pereira Gama-Filho, Miguel Eugenio L Castelo-Branco, Camila Cristina S Torres
INTRODUCTION: The caudate lobe is a distinct liver lobe and surgical resection requires expertise and precise anatomic knowledge. Left-sided approach was described for resection of small tumors originated in the Spiegel lobe but now the procedure has been performed even for tumors more than five centimeters. The aim of this study is to present three cases of tumor of caudate lobe underwent isolated lobectomy by left-sided approach. PRESENTATION OF CASE: Three patients with metastasis of colorectal cancer, carcinoma hepatocellular and metastasis of neuroendocrine tumor underwent resection...
July 4, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28713683/do-we-really-care-about-incidental-lung-nodules-review-of-atypical-lung-carcinoid-and-a-proposal-for-systematic-patient-follow-up
#13
Henal Motiwala, Itisha Bansal, Pradeep Goyal, Olena Dorokhova, Yogesh Kumar, Thomas D Olsavsky, Albert DiMeo, Nishant Gupta
Atypical lung carcinoids are intermediate-grade neuroendocrine tumors (NETs) with malignant potential. They are often detected incidentally on imaging done for non-related causes, as the patients are frequently asymptomatic. Histopathology is required to confirm the diagnosis with immunohistochemistry (IHC). Due to their indolent nature, these are often diagnosed only in the advanced stages. Treatment options include chemoradiation for widespread disease versus surgery for local or minimally invasive disease...
June 2017: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/28712751/melaena-in-a-patient-with-a-metastasized-neuroendocrine-tumor
#14
Johannes Hofland, Arjun D Koch, Wouter W de Herder
No abstract text is available yet for this article.
July 13, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28710883/an-atypical-type-i-gastric-neuroendocrine-tumor
#15
Andrada-Viorela Gheorghe, Mihai Rimbas, Octav Ginghina, Andrada Spanu, Theodor Alexandru Voiosu
BACKGROUND: Gastric neuroendocrine tumors(GI-NETs) are rare lesions, usually discovered incidentally during endoscopy. Based on their pathology, there are 4 types of GI-NETs. Type I are multiple small polypoid lesions with central ulceration located in the gastric body or the fundus, associated with atrophic gastritis usually noninvasive and very rarely metastatic. We report on a rare case of a gastric NET arising from the muscularis propria layer of the pyloric ring. CASE REPORT: We present the case of a 65-year old woman with a history of alcoholic cirrhosis, investigated for melena...
July 14, 2017: Romanian Journal of Internal Medicine, Revue Roumaine de Médecine Interne
https://www.readbyqxmd.com/read/28710117/genetic-and-epigenetic-drivers-of-neuroendocrine-tumors-net
#16
Annunziata Di Domenico, Tabea Wiedmer, Ilaria Marinoni, Aurel Perren
Neuroendocrine tumors (NET) of the gastrointestinal tract and the lung are a rare and heterogeneous group of tumors. The molecular characterization and the clinical classification of these tumors have been evolving slowly and show differences according to organs of origin. Novel technologies such as next-generation sequencing revealed new molecular aspects of NET over the last years. Notably, whole exome/genome sequencing (WES/WGS) approaches underlined the very low mutation rate of well differentiated NET of all organs compared to other malignancies, while the engagement of epigenetic changes in driving NET evolution is emerging...
July 14, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28707013/sunitinib-is-effective-and-tolerable-in-chinese-patients-with-advanced-pancreatic-neuroendocrine-tumors-a-multicenter-retrospective-study-in-china
#17
Yuhong Wang, Kaizhou Jin, Huangying Tan, Pan Zhang, Qiuchen Yang, Wei Wang, Jie Li, Chenghao Shao, Ling Xue, Shiting Feng, Minhu Chen, Xianjun Yu, Jie Chen
PURPOSE: To determine the efficacy and safety of sunitinib in Chinese patients with unresectable or metastatic pancreatic neuroendocrine tumors (pNETs) and the clinical significance of steady-state sunitinib serum concentrations. METHODS: We conducted a multicenter retrospective study including six centers from across China. A total of 60 patients with unresectable or metastatic pNETs who were treated with sunitinib were evaluated retrospectively. RESULTS: The median overall survival (OS) was 47...
July 13, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28706137/assessment-of-pancreatic-neuroendocrine-tumor-cytologic-genotype-diversity-to-guide-personalized-medicine-using-a-custom-gastroenteropancreatic-next-generation-sequencing-panel
#18
Ferga C Gleeson, Jesse S Voss, Benjamin R Kipp, Sarah E Kerr, John S Van Arnam, John R Mills, Cherisse A Marcou, Amber R Schneider, Zheng Jin Tu, Michael R Henry, Michael J Levy
BACKGROUND: Recent genetic studies have highlighted that alterations in MEN1, chromatin remodeling genes, and mammalian target of rapamycin (mTOR) pathway genes are the most frequent molecular events identified in pancreas neuroendocrine tumors (pNETs). The prognostic or predictive impact of these biomarkers and other less frequently observed aberrations, i.e. PTEN, TSC2 and PIK3CA are relatively unknown. The aims of this targeted next generation sequencing (NGS) study were to assess tumor cytology genotype diversity, to survey for potential adverse prognostic biomarkers and the prevalence of mTOR pathway variants...
June 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28705916/biodistribution-and-dosimetry-of-18-f-meta-fluorobenzyl-guanidine-mfbg-a-first-in-human-pet-ct-imaging-study-of-patients-with-neuroendocrine-malignancies
#19
Neeta Pandit-Taskar, Pat B Zanzonico, Kevin D Staton, Jorge A Carrasquillo, Diane Reidy-Lagunes, Serge K Lyashchenko, Eva Burnazi, Hanwen Zhang, Jason S Lewis, Ronald Blasberg, Steven M Larson, Wolfgang Andreas Weber, Shakeel Modak
Introduction: Iodine-123-meta-iodobenzylguanidine ((123)I-MIBG) imaging is currently a mainstay in the evaluation of many neuroendocrine tumors, especially neuroblastoma. (123)I-MIBG imaging has several limitations that can be overcome by the use of a PET agent. (18)F-MFBG is a positron emission tomography (PET) analog of MIBG that may allow for single-day, high-resolution quantitative imaging. We conducted a first-in-human study of (18)F-MFBG PET imaging to evaluate the safety, feasibility, pharmacokinetics, and dosimetry of (18)F-MFBG in neuroendocrine tumors (NETs)...
July 13, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28705700/incidental-primary-intradural-carcinoid-tumor-in-a-patient-with-lumbar-radiculopathy
#20
Stavros Koustais, Philip O'Halloran, Alfrazdaq Hassan, Francesca Brett, Steven Young
BACKGROUND: Carcinoid tumors are neuroendocrine neoplasms derived from enterochromaffin cells. Central nervous system involvement is rare. The reported cases include metastases to brain or spinal cord, as well as primary skeletal or extradural disease resulting in compressive myelo-radiculopathy. There are two previously reported cases of primary intradural extramedullary carcinoid tumor, presenting with compressive symptoms. We report the first case of primary incidental intradural extramedullary carcinoid tumor...
July 10, 2017: World Neurosurgery
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