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gastrointestinal stromal tumors

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https://www.readbyqxmd.com/read/29145240/gastrointestinal-stromal-tumor-gist-with-liver-metastases-an-18-year-experience-from-the-gist-cooperation-group-in-north-china
#1
Yi-Nan Shi, Yong Li, Li-Ping Wang, Zhen-Hua Wang, Xiao-Bo Liang, Han Liang, Li Zhang, Bin Li, Li-Qiao Fan, Qun Zhao, Zhi-Xue Ma, Xue-Feng Zhao, Zhi-Dong Zhang, Yu Liu, Bi-Bo Tan, Dong Wang, Li-Li Wang, Ying-Jie Hao, Nan Jia
Approximately 40% to 50% of gastrointestinal stromal tumor (GIST) patients will have recurrence or metastases after resection of the primary lesion, and the most common affected sites will be liver and peritoneum. Imatinib has been considered as the first-line therapy of metastatic GIST. Surgery for metastases is proposed when possible. Furthermore, there are controversies concerning hepatic resection and systemic tyrosin kinase inhibitors (TKIs). The therapeutic conditions and long-term outcome of GIST patients with liver metastases in northern China remain unknown...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29143894/mechanism-of-resistance-in-gastrointestinal-stromal-tumors
#2
E Tamborini
Imatinib has revolutionized the treatment of GIST since this drug is able to inhibit tumoral growth by blocking the activity of receptor tyrosine kinases, KIT or PDGFRA, that in these tumors are constitutively activated because of the presence of mutations that alters their catalytic activity. However, despite this enormous improvement in the RFS and OS and in the quality of life of GIST patients, imatinib is not able to eradicate the disease: recurrences occur and acquired resistance is a common event which develops during targeted treatments...
November 17, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/29136686/-clinicopathologic-and-molecular-characteristics-of-malignant-gastrointestinal-neuroectodermal-tumors
#3
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/29136672/laparoscopic-and-endoscopic-cooperative-surgery-for-difficult-resection-of-posterior-esophagogastric-junction-gastrointestinal-stromal-tumors
#4
Jean-Michel Gonzalez, Antoine Debourdeau, Guillaume Philouze, Laura Beyer, Stéphane Berdah, Marc Barthet
No abstract text is available yet for this article.
November 14, 2017: Endoscopy
https://www.readbyqxmd.com/read/29133619/clinical-application-of-circulating-tumor-dna-in-the-genetic-analysis-of-patients-with-advanced-gist
#5
Hao Xu, Liang Chen, Yang Shao, Dongqin Zhu, Xiaofei Zhi, Qiang Zhang, Fengyuan Li, Jianghao Xu, Xisheng Liu, Zekuan Xu
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumor of digestive tract. In the past, tissue biopsy was the main method for the diagnosis of GISTs. While circulating tumor DNA (ctDNA) detection by next-generation sequencing (NGS) may be a feasible and replaceable method for diagnosis of GISTs. We retrospectively analyzed the data for ctDNA and tissue DNA detection from 32 advanced GIST patients. We found that NGS obviously increased the positive rate of ctDNA detection. ctDNA detection identified rare mutations that were not detected in tissue DNA detection...
November 13, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29132401/meta-analysis-comparing-laparoscopic-versus-open-resection-for-gastric-gastrointestinal-stromal-tumors-larger-than-5%C3%A2-cm
#6
Xiao Lian, Fan Feng, Man Guo, Lei Cai, Zhen Liu, Shushang Liu, Shuao Xiao, Gaozan Zheng, Guanghui Xu, Hongwei Zhang
BACKGROUND: Data on the safety and feasibility of laparoscopic versus open resection for gastric gastrointestinal stromal tumors (GISTs) larger than 5 cm are limited. Therefore, the aim of this meta-analysis was to compared laparoscopic and open resection for gastric GISTs larger than 5 cm. METHODS: We perform a literature search on PubMed, the Cochrane Library, and Embase. Review Manage version 5.1 (RevMan 5.1) was used for data analysis. The GRADE profiler software (version 3...
November 13, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29131458/image-analysis-is-an-excellent-tool-for-quantifying-ki-67-to-predict-the-prognosis-of-gastrointestinal-stromal-tumor-patients
#7
Shintaro Sugita, Hiroshi Hirano, Yutaka Hatanaka, Hiromi Fujita, Terufumi Kubo, Noriaki Kikuchi, Yumika Ito, Taro Sugawara, Keiko Segawa, Hiroyuki Hisai, Kentaro Yamashita, Takayuki Nobuoka, Yoshihiro Matsuno, Tadashi Hasegawa
We investigated the quantification of Ki-67 staining using digital image analysis (IA) as a complementary prognostic factor to the modified National Institutes of Health (NIH) classification in patients with gastrointestinal stromal tumor (GIST). We examined 92 patients, focusing on the correlation between age, sex, primary tumor site, tumor size, predominant histologic type, mitotic index, modified NIH classification (low/intermediate vs high), Ki-67 quantitation, and recurrence-free survival (RFS). We compared two IA processes for whole slide imaging (WSI) and manually captured image (MCI) methods...
November 13, 2017: Pathology International
https://www.readbyqxmd.com/read/29120569/abdominal-ultrasound-%C3%A2-the-leading-method-in-duodenal-gist-diagnostics
#8
Sven Bohnec, Ivan Budimir, Davor Hrabar, Nenad Babić, Ivan Budimir, Marko Nikolić, Ivana Pavić
Gastrointestinal stromal tumors (GIST) are the most common mesenchymal tumors of the digestive tract and are generally asymptomatic. A 39-year-old female patient was hospitalized in 2012 at Clinical Department of Internal Medicine, Sestre milosrdnice University Hospital Center, for a focal hypodense irregular circular lesion located in segment III of the left hepatic lobe, accidentally found by ultrasonography and verified by computed tomography. The findings were also verified with nuclear magnetic resonance and esophagogastroduodenoscopy...
March 2017: Acta Clinica Croatica
https://www.readbyqxmd.com/read/29116489/long-term-survival-according-to-histology-and-radiologic-response-to-preoperative-chemotherapy-in-126-patients-undergoing-resection-of-non-gist-sarcoma-liver-metastases
#9
Claire Goumard, Leonardo P Marcal, Wei-Lien Wang, Neeta Somaiah, Masayuki Okuno, Christina L Roland, Ching-Wei D Tzeng, Yun Shin Chun, Barry W Feig, Jean-Nicolas Vauthey, Claudius Conrad
BACKGROUND: Non-gastrointestinal stromal tumor sarcomas (NGSs) have heterogeneous histology, and this heterogeneity may lead to uncertainty regarding the prognosis of patients with liver metastases from NGS (NGSLM) and decision regarding their surgical management. Furthermore, the role of preoperative chemotherapy in treatment of NGSLM remains poorly defined. We investigated long-term survival and its correlation to response to preoperative chemotherapy in patients with NGSLM. PATIENTS AND METHOD: Patients who underwent liver resection for NGSLM during 1998-2015 were identified...
November 7, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29115925/synchronous-occurrence-of-hereditary-gastric-adenocarcinoma-gastrointestinal-stromal-tumor-and-esophageal-small-cell-and-squamous-carcinoma-in-situ-an-extremely-rare-case-report
#10
Huijie Fan, Pei Lu, Li Xu, Yanru Qin, Jing Li
BACKGROUND: Hereditary diffuse gastric carcinoma (HDGC) accounts for 1-3% of all gastric carcinomas. Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors in the gastrointestinal (GI) tract but they comprise fewer than 1% of all GI malignancies. Small-cell carcinoma (SmCC) is a rare histological type of esophageal carcinoma, accounting for 0.4% to 2.8% of all esophageal tumors. Co-occurrence of SmCC with esophageal tumors caused by squamous carcinoma is also very uncommon...
November 7, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29113198/downregulation-of-mir-186-is-associated-with-metastatic-recurrence-of-gastrointestinal-stromal-tumors
#11
Takeshi Niinuma, Masahiro Kai, Hiroshi Kitajima, Eiichiro Yamamoto, Taku Harada, Reo Maruyama, Takayuki Nobuoka, Toshirou Nishida, Tatsuo Kanda, Tadashi Hasegawa, Takashi Tokino, Tamotsu Sugai, Yasuhisa Shinomura, Hiroshi Nakase, Hiromu Suzuki
Although dysregulation of microRNAs (miRNAs/miRs) is a common feature of human malignancies, its involvement in gastrointestinal stromal tumors (GISTs) is not fully understood. The present study aimed to identify the miRNAs that perform a role in GIST metastasis. miRNA expression profiles from a series of 32 primary GISTs were analyzed using microarrays, and miR-186 was observed to be downregulated in tumors exhibiting metastatic recurrence. Reverse transcription-quantitative polymerase chain reaction analysis of an independent cohort of 100 primary GISTs revealed that low miR-186 expression is associated with metastatic recurrence and a poor prognosis...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29113157/lack-of-microsatellite-instability-in-gastrointestinal-stromal-tumors
#12
Nathália C Campanella, Cristovam Scapulatempo-Neto, Lucas Faria Abrahão-Machado, Antônio Talvane Torres De Oliveira, Gustavo N Berardinelli, Denise Peixoto Guimarães, Rui M Reis
The microsatellite instability (MSI) phenotype may constitute an important biomarker for patient response to immunotherapy, particularly to anti-programmed death-1 inhibitors. MSI is a type of genomic instability caused by a defect in DNA mismatch repair (MMR) proteins, which is present mainly in colorectal cancer and its hereditary form, hereditary nonpolyposis colorectal cancer. Gastrointestinal stromal tumor (GIST) development is associated with activating mutations of KIT proto-oncogene receptor tyrosine kinase (KIT) or platelet-derived growth factor receptor α (PDGFRA), which are oncogenes that predict the response to imatinib mesylate...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29110548/new-targets-and-therapies-for-gastrointestinal-stromal-tumors
#13
Agnieszka Wozniak, Yemarshet K Gebreyohannes, Maria Debiec-Rychter, Patrick Schöffski
The majority of gastrointestinal stromal tumors (GIST) are driven by an abnormal receptor tyrosine kinase (RTK) signaling, occurring mainly due to somatic mutations in KIT or platelet derived growth factor receptor alpha (PDGFRA). Although the introduction of tyrosine kinase inhibitors (TKIs) has revolutionized therapy for GIST patients, with time the vast majority of them develop TKI resistance. Advances in understanding the molecular background of GIST resistance allows for the identification of new targets and the development of novel strategies to overcome or delay its occurrence...
November 7, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/29110055/reproducible-imaging-features-of-biologically-aggressive-gastrointestinal-stromal-tumors-of-the-small-bowel
#14
Francisco J Maldonado, Shannon P Sheedy, Veena R Iyer, Stephanie L Hansel, David H Bruining, Cynthia H McCollough, William S Harmsen, John M Barlow, Joel G Fletcher
PURPOSE: To identify reproducible CT imaging features of small bowel gastrointestinal stromal tumors (GIST) that are associated with biologic aggressiveness. METHODS: Patients with histologically proven small bowel GISTs and CT enterography or abdominopelvic CT were included. Biologic aggressiveness was established based on initial histologic grading (very low risk to malignant), with "malignant" assigned if recurrence or metastases developed subsequently. CT exams were independently evaluated by three gastrointestinal radiologists for tumor size, growth pattern, enhancement, tumor borders, necrosis, calcification, ulceration, multiplicity, internal air or enteric contrast, nodal metastasis, liver metastasis, peritoneal metastasis, ascites, and draining vein size...
November 6, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29107068/targeting-tumor-cells-based-on-phosphodiesterase-3a-expression
#15
Madiha Nazir, Wojciech Senkowski, Frida Nyberg, Kristin Blom, Per-Henrik Edqvist, Malin Jarvius, Claes Andersson, Mats G Gustafsson, Peter Nygren, Rolf Larsson, Mårten Fryknäs
We and others have previously reported a correlation between high phosphodiesterase 3A (PDE3A) expression and selective sensitivity to phosphodiesterase (PDE) inhibitors. This indicates that PDE3A could serve both as a drug target and a biomarker of sensitivity to PDE3 inhibition. In this report, we explored publicly available mRNA gene expression data to identify cell lines with different PDE3A expression. Cell lines with high PDE3A expression showed marked in vitro sensitivity to PDE inhibitors zardaverine and quazinone, when compared with those having low PDE3A expression...
October 26, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/29104864/imaging-therapy-response-of-gastrointestinal-stromal-tumors-gist-with-fdg-pet-ct-and-mri-a-systematic-review
#16
REVIEW
Antonia Dimitrakopoulou-Strauss, Ulrich Ronellenfitsch, Caixia Cheng, Leyun Pan, Christos Sachpekidis, Peter Hohenberger, Thomas Henzler
Purpose: Improvement of the therapeutic approaches in gastrointestinal stromal tumors (GIST) by the introduction of targeted therapies requires appropriate diagnostic tools, which allow sufficient assessment of therapeutic response, including differentiation of true progression from pseudoprogression due to myxoid degeneration or intratumoral hemorrhage. In this literature review the impact and limitations of different imaging modalities used in GIST therapy monitoring are discussed. Methods: PubMed and Cochrane library search were performed using appropriate keywords...
2017: Clinical and Translational Imaging: Reviews in Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29100343/establishment-and-characterization-of-patient-derived-xenograft-models-of-gastrointestinal-stromal-tumor-resistant-to-standard-tyrosine-kinase-inhibitors
#17
Young-Soon Na, Min-Hee Ryu, Changhoon Yoo, Ju-Kyung Lee, Jung Min Park, Chae-Won Lee, Sun Young Lee, Young-Kyoung Shin, Ja-Lok Ku, Sung-Min Ahn, Yoon-Koo Kang
Gastrointestinal stromal tumors (GISTs) with KIT or platelet-derived growth factor receptor alpha (PDGFRa) oncogenic driver gene mutations, respond to tyrosine kinase inhibitors (TKIs) including imatinib, sunitinib, and regorafenib. However, most patients develop TKI resistance; therefore, novel agents are required. We established three TKI-resistant GIST patient-derived xenograft (PDX) models for effective drug development. These were PDX models harboring primary and secondary KIT and additional mutations; KIT exon 11 (p...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29098070/imatinib-response-of-gastrointestinal-stromal-tumor-patients-with-germline-mutation-on-kit-exon-13-a-family-report
#18
Gulgun Engin, Serpil Eraslan, Hülya Kayserili, Yersu Kapran, Haluk Akman, Ali Akyuz, Nuri Faruk Aykan
Familial gastrointestinal stromal tumor (GIST) is a rare autosomal dominant disorder associated with mutations in the KIT gene in the majority of cases. Although, exon 11 appears to be the hot spot region for approximately 95% of germline mutations, pathogenic variations have also been identified in exon 8, 13 and 17. Exon 13 germline mutations are extremely rare amongst familial GISTs and seven families with a germline mutation have been reported to date. Moreover, the role of imatinib mesylate in this rare familiar settings is not completely known so far...
September 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/29093627/oval-mucosal-opening-bloc-biopsy-after-incision-and-widening-by-ring-thread-traction-for-submucosal-tumor
#19
Hirohito Mori, Hideki Kobara, Yu Guan, Yasuhiro Goda, Nobuya Kobayashi, Noriko Nishiyama, Tsutomu Masaki
Gastric submucosal tumors (SMTs) less than 2 cm are generally considered benign neoplasms, and endoscopic observation is recommended, but SMTs over 2 cm, 40% of which are gastrointestinal stromal tumors (GISTs), have malignant potential. Although the Japanese Guidelines for GIST recommend partial surgical resection for GIST over 2 cm with malignant potential as well as en bloc large tissue sample to obtain appropriate and large specimens of SMTs, several reports have been published on tissue sampling of SMTs, such as with endoscopic ultrasound sound fine needle aspiration, submucosal tunneling bloc biopsy, and the combination of bite biopsy and endoscopic mucosal resection...
October 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29093181/a-precision-therapy-against-cancers-driven-by-kit-pdgfra-mutations
#20
Erica K Evans, Alexandra K Gardino, Joseph L Kim, Brian L Hodous, Adam Shutes, Alison Davis, Xing Julia Zhu, Oleg Schmidt-Kittler, Doug Wilson, Kevin Wilson, Lucian DiPietro, Yulian Zhang, Natasja Brooijmans, Timothy P LaBranche, Agnieszka Wozniak, Yemarshet K Gebreyohannes, Patrick Schöffski, Michael C Heinrich, Daniel J DeAngelo, Stephen Miller, Beni Wolf, Nancy Kohl, Timothy Guzi, Nicholas Lydon, Andy Boral, Christoph Lengauer
Targeting oncogenic kinase drivers with small-molecule inhibitors can have marked therapeutic benefit, especially when administered to an appropriate genomically defined patient population. Cancer genomics and mechanistic studies have revealed that heterogeneous mutations within a single kinase can result in various mechanisms of kinase activation. Therapeutic benefit to patients can best be optimized through an in-depth understanding of the disease-driving mutations combined with the ability to match these insights to tailored highly selective drugs...
November 1, 2017: Science Translational Medicine
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