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Intestinal neuroendocrine tumors

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https://www.readbyqxmd.com/read/29331677/identification-of-potential-mr-derived-biomarkers-for-tumor-tissue-response-to-177lu-octreotate-therapy-in-an-animal-model-of-small-intestine-neuroendocrine-tumor
#1
Mikael Montelius, Johan Spetz, Oscar Jalnefjord, Evelin Berger, Ola Nilsson, Maria Ljungberg, Eva Forssell-Aronsson
Magnetic resonance (MR) methods enable noninvasive, regional tumor therapy response assessment, but associations between MR parameters, underlying biology, and therapeutic effects must be investigated. The aim of this study was to investigate response assessment efficacy and biological associations of MR parameters in a neuroendocrine tumor (NET) model subjected to radionuclide treatment. Twenty-one mice with NETs received 177Lu-octreotate at day 0. MR experiments (day -1, 1, 3, 8, and 13) included T2-weighted, dynamic contrast-enhanced (DCE) and diffusion-weighted imaging (DWI) and relaxation measurements (T1/T2*)...
January 10, 2018: Translational Oncology
https://www.readbyqxmd.com/read/29316326/orthopedia-homeobox-is-preferentially-expressed-in-typical-carcinoids-of-the-lung
#2
Krisztina Z Hanley, Zachary J Dureau, Cynthia Cohen, Dong M Shin, Taofeek K Owonikoko, Gabriel L Sica
BACKGROUND: Twenty-seven percent of neuroendocrine tumors (NETs) are associated with distant metastases, and in some patients, the primary site is unknown. Orthopedia homeobox protein (OTP) has been described as a useful marker for lung carcinoids (LCs) and for separating low-grade typical carcinoids (TCs) from intermediate-grade atypical carcinoids (ACs) in resection specimens. This study evaluated OTP, thyroid transcription factor 1 (TTF-1), and Ki-67 expression in fine-needle aspiration (FNA) samples of various NETs...
January 9, 2018: Cancer
https://www.readbyqxmd.com/read/29259385/midgut-neuroendocrine-tumor-presenting-with-acute-intestinal-ischemia
#3
Ioannis Mantzoros, Natalia Antigoni Savvala, Orestis Ioannidis, Styliani Parpoudi, Lydia Loutzidou, Despoina Kyriakidou, Angeliki Cheva, Vasileios Intzos, Konstantinos Tsalis
Neuroendocrine tumors represent a heterogeneous group of neoplasms that arise from neuroendocrine cells and secrete various peptides and bioamines. While gastrointestinal neuroendocrine tumors, commonly called carcinoids, account for about 2/3 of all neuroendocrine tumors, they are relatively rare. Small intestine neuroendocrine tumors originate from intestinal enterochromaffin cells and represent about 1/4 of small intestine neoplasms. They can be asymptomatic or cause nonspecific symptoms, which usually leads to a delayed diagnosis...
December 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29232343/simultaneous-glucagon-and-vasoactive-intestinal-peptide-producing-pancreatic-neuroendocrine-tumors-in-a-patient-with-multiple-endocrine-neoplasia-type-1-a-case-report-and-literature-review
#4
Grace Y Kim, Sungeun Kim, Raquel Kristin S Ong, Hassan Shawa
No abstract text is available yet for this article.
January 2018: Pancreas
https://www.readbyqxmd.com/read/29211313/comparative-study-of-lung-and-extrapulmonary-poorly-differentiated-neuroendocrine-carcinomas-a-seer-database-analysis-of-162-983-cases
#5
Arvind Dasari, Kathan Mehta, Lauren A Byers, Halfdan Sorbye, James C Yao
BACKGROUND: Extrapulmonary neuroendocrine carcinomas (NECs) are poorly studied and are managed similar to lung NECs, which may not account for differences between the 2 groups of tumors as well as the heterogeneity within extrapulmonary NEC. METHODS: Data from the Surveillance, Epidemiology, and End Results program between 1973 and 2012 were used to estimate the relative percentages of lung NECs and subgroups of extrapulmonary NECs, epidemiological patterns at these sites, and the median and 5-year overall survival rates...
December 6, 2017: Cancer
https://www.readbyqxmd.com/read/29201452/neuroendocrine-tumors-of-the-thymus-the-oncologist-point-of-view
#6
REVIEW
Nicolas Girard
Thymic malignancies represent a heterogeneous group of rare thoracic cancers, which are classified according to the World Health Organization (WHO) histopathologic classification that distinguishes thymomas from thymic carcinomas and neuroendocrine tumors; neuroendocrine thymic tumors (NETTs) exhibit the same histological spectrum as in other anatomical locations, although with different frequencies. NETTs represent around 2% of all neuroendocrine tumors, and about 5% of all thymic malignancies. Overall, the management of patients with NETTs tumors requires continuous multidisciplinary expertise at any step of the disease progression...
November 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29194046/updates-on-the-biology-of-serotonin-and-tryptophan-hydroxylase
#7
Tara Swami, H Christian Weber
PURPOSE OF REVIEW: To summarize the most recent findings relevant to the biology of serotonin (5-hydroxytryptamine; 5-HT) and the enzyme tryptophan hydroxylase (TPH) in human gastrointestinal disease. RECENT FINDINGS: Serotonin is synthesized in the central nervous system (CNS) and the gastrointestinal tract where it is secreted from enteroendocrine cells. Its biosynthesis is regulated by two isoforms of the enzyme TPH of which TPH1 is localized predominantly in gastrointestinal enteroendocrine cells...
February 2018: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/29184699/pancreatic-non-functioning-neuroendocrine-tumor-a-new-entity-genetically-related-to-lynch-syndrome
#8
Anna Serracant Barrera, Sheila Serra Pla, Carmen María Blázquez Maña, Rubén Carrera Salas, Neus García Monforte, Natalia Bejarano González, Andreu Romaguera Monzonis, Francisco Javier Andreu Navarro, Maria Rosa Bella Cueto, Francisco G Borobia
Some pancreatic neuroendocrine tumors (P-NETs) are associated with hereditary syndromes. An association between Lynch syndrome (LS) and P-NETs has been suggested, however it has not been confirmed to date. We describe the first case associating LS and P-NETs. Here we report a 65-year-old woman who in the past 20 years presented two colorectal carcinomas (CRC) endometrial carcinoma (EC), infiltrating ductal breast carcinoma, small intestine adenocarcinoma, two non-functioning P-NETs and sebomatricoma. With the exception of one P-NET, all these conditions were associated with LS, as confirmed by immunohistochemistry (IHC) and polymerase chain reaction (PCR)...
October 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/29177164/medical-therapy-of-gastrointestinal-neuroendocrine-tumors
#9
REVIEW
Kjell Öberg
Intestinal neuroendocrine tumors (NETs) constitute a heterogeneous group with duodenal, small intestinal, colonic and rectal NETs. They constitute more than half of all NETs, with the highest frequencies in the rectum, small intestine, and colon. The tumor biology varies with the location of the primary tumor as well as with the grade and staging of the tumor. Small intestinal NETs usually present low proliferation and are treated in the first line with somatostatin analogs according to current guidelines. If progression occurs, one can add interferon alpha or change the treatment to everolimus...
October 2017: Visceral Medicine
https://www.readbyqxmd.com/read/29177162/surgical-treatment-of-small-intestinal-neuroendocrine-tumors-g1-g2
#10
REVIEW
Andreas Selberherr, Martin B Niederle, Bruno Niederle
Although the majority of neuroendocrine tumors of the small intestine (siNETs) classified as low-grade G1 or G2 show slow local growth, they are frequently diagnosed at an advanced stage of metastatic disease. The surgical treatment is curative in stages I-III or palliative in stage IV in an attempt to avoid local complications of bowel obstruction and ischemia of the small bowel by unremoved lymph node metastases. Individualized surgical procedures performed by experienced surgeons considering tumor multifocality and the primary extent of lymph node metastases along the mesenteric vessels are recommended to remove as much tumor volume as possible, while avoiding major complications intraoperatively and small bowel syndrome postoperatively...
October 2017: Visceral Medicine
https://www.readbyqxmd.com/read/29167951/radioembolization-versus-bland-embolization-for-hepatic-metastases-from-small-intestinal-neuroendocrine-tumors-short-term-results-of-a-randomized-clinical-trial
#11
Anna-Karin Elf, Mats Andersson, Olof Henrikson, Oscar Jalnefjord, Maria Ljungberg, Johanna Svensson, Bo Wängberg, Viktor Johanson
BACKGROUND: Radioembolization (RE) with intra-arterial administration of (90)Y microspheres is a promising technique for the treatment of liver metastases from small intestinal neuroendocrine tumors (SI-NET) not amenable to surgery or local ablation. However, studies comparing RE to other loco-regional therapies are lacking. The aim of this randomized study was to compare the therapeutic response and safety after RE and bland hepatic arterial embolization (HAE), and to investigate early therapy-induced changes with diffusion-weighted MRI (DWI-MRI)...
November 22, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29159606/preoperative-68ga-dota-somatostatin-analog-pet-ct-hybrid-imaging-increases-detection-rate-of-intra-abdominal-small-intestinal-neuroendocrine-tumor-lesions
#12
Olov Norlén, Harald Montan, Per Hellman, Peter Stålberg, Anders Sundin
BACKGROUND: Small intestinal neuroendocrine tumors (SI-NETs) are the most common form of neoplasm in the small bowel. Radiological identification of primary tumors (PT), which may be multiple, is difficult, and therefore palpation of the entire small bowel is routinely performed during laparotomy. The aim was to determine detection rates of PT and peritoneal carcinomatosis (PC) with 68Ga-DOTATOC/TATE-PET/CT in comparison with i.v. contrast-enhanced computed tomography (CE-CT) and thus to clarify whether modern functional imaging can mitigate the need for palpation of bowel during surgery enabling oncologically adequate laparoscopic resection...
November 20, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29155309/prognostic-utility-of-total-68ga-dotatate-avid-tumor-volume-in-patients-with-neuroendocrine-tumors
#13
Amit Tirosh, Georgios Z Papadakis, Corina Millo, Dima Hammoud, Samira M Sadowski, Peter Herscovitch, Karel Pacak, Stephen J Marx, Lily Yang, Pavel Nockel, Jasmine Shell, Patience Green, Xavier M Keutgen, Dhaval Patel, Naris Nilubol, Electron Kebebew
BACKGROUND & AIMS: Survival times vary among patients with neuroendocrine tumors (NETs)-even among those with the same site, stage, and grade of primary tumor. This makes it difficult to select treatment for patients with unresectable NETs, because some patients can survive decades without treatment. 68Gallium-DOTATATE positron emission tomography with computed tomography (68Ga-DOTATATE PET/CT) is a sensitive imaging technique for detection of NETs. We investigated the prognostic accuracy of 68Ga-DOTATATE PET/CT analysis of tumor volume in patients with NETs...
November 16, 2017: Gastroenterology
https://www.readbyqxmd.com/read/29137096/synchronous-multiple-carcinoma-with-small-intestine-and-pulmonary-neuroendocrine-involvement-a-case-report
#14
Binbin Shan, Quanmao Zhang, Yuan Li, Fucai Han
RATIONALE: In clinical work, neuroendocrine synchronous multiplicity carcinoma was relatively rare. Most were confirmed by the pathological diagnosis of a certain part of the body combined with the imaging of the whole body, while cases that had both pathological and immunohistochemistry diagnosis were few. PATIENT CONCERNS: A patient who presented with abdominal pain visited our hospital, and was diagnosed with lesions in both the small intestine and lung. DIAGNOSES: Both were considered primary tumors by imaging, and diagnosed as neuroendocrine carcinomas by pathology...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29136686/-clinicopathologic-and-molecular-characteristics-of-malignant-gastrointestinal-neuroectodermal-tumors
#15
M Zhao, T W Zhao, J Ma, C Y Wu, L Chen, G Q Ru, X L He
Objective: To investigate the clinicopathologic and molecular characteristics, diagnostic, differential diagnostic and prognostic features of malignant gastrointestinal neuroectodermal tumor. Methods: Two cases of malignant gastrointestinal neuroectodermal tumor were retrieved; the clinical and radiologic features, histomorphology, immunophenotype, molecular genetics and prognosis were analyzed and the relevant literature reviewed. Results: Case 1 was a 57-year-old male, presented with recurrent abdominal pain and melena...
November 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29127554/is-there-any-role-for-minimally-invasive-surgery-in-net
#16
REVIEW
M Thomaschewski, H Neeff, T Keck, H P H Neumann, T Strate, E von Dobschuetz
Neuroendocrine tumors (NET) represent the variability of almost benign lesions either secreting hormones occurring as a single lesion up to malignant lesions with metastatic potential. Treatment of NET is usually performed by surgical resection. Due to the rarity of NET, surgical treatment is mainly based on the experience and recommendations of experts and less on the basis of prospective randomized studies. In addition, the development and establishment of new surgical procedures is made more difficult by their rarity...
November 11, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/29121860/pneumatosis-cystoides-intestinalis-associated-with-sunitinib-and-a-literature-review
#17
Yong Suk Lee, Jae Joon Han, Si-Young Kim, Chi Hoon Maeng
BACKGROUND: Pneumatosis cystoides intestinalis (PCI) is a rare self-limiting condition characterized by air-filled cysts within intestinal walls. Diagnosis should be prudent because it can mimic pneumoperitoneum leading to unnecessary treatment such as surgical exploration. Although various drugs including anti-neoplastic agents have been suggested as etiologies, cases related to sunitinib are sparse. Because of the rarity of this unusual side effect by sunitinib, we report the case report...
November 9, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29118267/clinical-usefulness-of-18-f-fluorodeoxyglucose-positron-emission-tomography-in-the-diagnostic-algorithm-of-advanced-entero-pancreatic-neuroendocrine-neoplasms
#18
Maria Rinzivillo, Stefano Partelli, Daniela Prosperi, Gabriele Capurso, Patrizia Pizzichini, Elsa Iannicelli, Elettra Merola, Francesca Muffatti, Francesco Scopinaro, Orazio Schillaci, Matteo Salgarello, Massimo Falconi, Gianfranco Delle Fave, Francesco Panzuto
BACKGROUND: The role of (18)F-fluorodeoxyglucose positron emission tomography ((18)F-FDG PET) in the diagnostic algorithm of entero-pancreatic neuroendocrine neoplasms (EP NENs) is unclear because most available data derive from heterogeneous populations in terms of tumor biology and disease status at time of examination. The aim of this study was to determine the ability of (18)F-FDG PET to identify patients with more aggressive disease among those with advanced EP NENs. Subjects, Materials, and Methods ...
November 8, 2017: Oncologist
https://www.readbyqxmd.com/read/29118225/activity-of-entrectinib-in-a-patient-with-the-first-reported-ntrk-fusion-in-neuroendocrine-cancer
#19
Darren Sigal, Marie Tartar, Marin Xavier, Fei Bao, Patrick Foley, David Luo, Jason Christiansen, Zachary Hornby, Edna Chow Maneval, Pratik Multani
Despite advances in genomic analysis, the molecular origin of neuroendocrine tumors (NETs) is complex and poorly explained by described oncogenes. The neurotrophic TRK family, including NTRK1, 2, and 3, encode the proteins TRKA, TRKB, TRKC, respectively, involved in normal nerve development. Because NETs develop from the diffuse neuroendocrine system, we sought to determine whether NTRK alterations occur in NETs and whether TRK-targeted therapy would be effective. A patient with metastatic well-differentiated NET, likely of the small intestine, was enrolled on the STARTRK2 trial (ClinicalTrials...
November 2017: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/29116005/composite-intestinal-adenoma-microcarcinoid-in-the-colon-and-rectum-a-case-series-and-historical-review
#20
Mi-Jung Kim, Eun-Jung Lee, Do Sun Kim, Doo Han Lee, Eui Gon Youk, Hyun-Jung Kim
BACKGROUND: Composite intestinal adenoma-microcarcinoid (CIAM) is a rare colorectal lesion that mostly comprises a conventional adenomatous component with a minute proportion of neuroendocrine (NE) component. Although microcarcinoids are well-recognized in the setting of chronic inflammatory disorders of the gastrointestinal tract, large intestinal microcarcinoids associated with intestinal adenoma are exceedingly rare and their clinicopathologic characteristics are yet to be elucidated...
November 7, 2017: Diagnostic Pathology
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