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Gastrointestinal tumors stromal

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https://www.readbyqxmd.com/read/28541845/a-metastatic-rectal-gastrointestinal-stromal-tumor-to-the-small-bowel-mesentery-treated-with-neoadjuvant-imatinib-and-debulking-surgery-followed-by-low-anterior-resection
#1
James Barger, James Kurtz, Kristin Ryan
No abstract text is available yet for this article.
May 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28541695/discovery-of-potent-selective-stem-cell-factor-receptor-platelet-derived-growth-factor-receptor-alpha-c-kit-pdgfr%C3%AE-dual-inhibitor-for-the-treatment-of-imatinib-resistant-gastrointestinal-stromal-tumors-gists
#2
Yanli Lu, Fei Mao, Xiaokang Li, Xinyu Zheng, Manjiong Wang, Qing Xu, Jin Zhu, Jian Li
c-KIT and platelet derived growth factor receptor alpha (PDGFRα) kinase play an important role in gastrointestinal stromal tumors (GISTs). Here, we have discovered an c-KIT/PDGFRα dual inhibitor, compound 31, with single-digit nanomolar potency against c-KIT and PDGFRα. Compared to Imatinib (1), 31 showed better antiproliferative efficacy against various TEL-c-KIT/PDGFRα-BaF3 isogenic cells, including three 1-resistant BaF3 cell lines, as well as against GIST-T1 and GIST-882 cell lines. Furthermore, compound 31 showed a good KinomeScan selectivity (468 kinases) (S score (1) = 0...
May 25, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28539323/etv1-positive-cells-give-rise-to-brafv600e-mutant-gastrointestinal-stromal-tumors
#3
Leili Ran, Devan Murphy, Jessica Sher, Zhen Cao, Shangqian Wang, Edward Walczak, Youxin Guan, Yuanyuan Xie, Shipra Shukla, Yu Zhan, Cristina R Antonescu, Yu Chen, Ping Chi
Gastrointestinal Stromal Tumor (GIST) is the most common subtype of sarcoma. Despite clinical advances in the treatment of KIT/PDGFRA-mutant GIST, similar progress against KIT/PDGFRA-wild type GIST, including mutant BRAF-driven tumors, have been limited by a lack of model systems. ETV1 is a master regulator in the intestinal cells of Cajal (ICC), thought to be the cells of origin of GIST. Here we present a model in which the ETV1 promoter is used to specifically and inducibly drive Cre recombinase in ICC as a strategy to study GIST pathogenesis...
May 24, 2017: Cancer Research
https://www.readbyqxmd.com/read/28537566/intramural-gastric-hematoma-imitating-a-gastrointestinal-stromal-tumor-case-report-and-literature-review
#4
Arkadiusz Spychała, Piotr Nowaczyk, Aleksandra Budnicka, Ewa Antoniewicz, Dawid Murawa
The article presents a case report of a patient with an intramural gastric hematoma. Diagnostic examinations were suggestive of a suspected gastrointestinal stromal tumor Normal image was observed in gastroscopic examination while abdominal CT scan revealed a nodular lesion along the greater curvature of the stomach extending from the posterior wall and adjoining the pancreas and the spleen. The patient was qualified for surgical treatment. Laparotomy was performed followed by total gastric resection and Roux-en-Y reconstruction of the gastrointestinal tract...
April 30, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/28535771/the-progressive-fragmentation-of-the-kit-pdgfra-wild-type-wt-gastrointestinal-stromal-tumors-gist
#5
Margherita Nannini, Milena Urbini, Annalisa Astolfi, Guido Biasco, Mara A Pantaleo
Recent advances in molecular biology have revolutionized the concept of KIT/PDGFRA wild type (WT) gastrointestinal stromal tumors (GIST) than the past. Indeed, from being defined as GIST without KIT or PDGFRA mutations, we are now faced with the opposite scenario, where KIT/PDGFRA WT GIST are "positively" defined according to their specific molecular alterations. In particular, if until recently KIT/PDGFRA GIST without abnormalities of KIT, PDGFRA, SDH, and the RAS signaling pathway were referred as quadruple WT GIST, today also this small subset of GIST is emerging out as a group of heterogeneous distinct entities with multiple different molecular alterations...
May 23, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28528977/imatinib-induces-autophagy-via-upregulating-xiap-in-gist882%C3%A2-cells
#6
Qingqing Xie, Qi Lin, Dezhi Li, Jianming Chen
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms originating from the gastrointestinal tract with gain of function mutations in receptor tyrosine kinases KIT or platelet-derived growth factor receptor A (PDGFRA). The main effective treatment for GISTs is tyrosine kinase inhibitors, such as imatinib mesylate. However, GISTs respond to imatinib treatment eventually develop acquired resistance, which is a main obstacle for GISTs therapy. Therefore, it's urgent to have a better understanding of the mechanisms underlying the imatinib resistance in GISTs to develop novel therapeutic strategies...
May 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28525452/concomitant-lung-cancer-and-gastrointestinal-stromal-tumor-first-report-of-hypoxia-imaging-with-18f-faza-pet-ct
#7
Paola Mapelli, Elena Incerti, Federico Fallanca, Valentino Bettinardi, Antonia Compierchio, Valeria Masiello, Claudio Doglioni, Francesca Rossetti, Giampiero Negri, Luigi Gianolli, Maria Picchio
A 76-year-old man underwent F-FDG PET/CT to complete staging and characterize a suspicious lung mass. Images showed intense uptake in the lung lesion and faint uptake in correspondence of a gastric mass, which was subsequently biopsied revealing a gastrointestinal stromal tumor. A F-FAZA PET/CT was also performed because of patient's enrollment in a prospective clinical trial (trial registration no. EudraCT 2011-002647-98), showing heterogeneous uptake of F-FAZA in the pulmonary lesion and faint uptake in correspondence of the gastrointestinal stromal tumor...
May 19, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28523328/duodenal-gastrointestinal-stromal-tumor-presenting-as-pancreatic-head-mass-a-case-report
#8
DănuŢ Vasile, George Iancu, Raluca Claudia Iancu, George Simion, Radu Constantin Ciuluvică
Duodenal gastrointestinal stromal tumors (GISTs) are uncommon. Tumors arising from the first and the second part of the duodenum (DI and DII, respectively) can be wrongly diagnosed as pancreatic mass. We present a case of a 59-year-old woman who came with abdominal pain and severe upper gastrointestinal bleeding (hemoglobin 3.5 g÷dL). A solid, heterogeneously enhancing neoplasm in the head of the pancreas was revealed preoperatively by an abdominal computed tomography scan. A diagnosis of GIST was suggested...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28523325/synchronous-gastric-tumors-case-presentation
#9
Carmen NeamŢu, Bogdan Dan Totolici, Octavian Marius CreŢu, Casiana Stănescu, Andrei Ardelean, Oana Badea, George Ciprian Pribac, Mircea Ovidiu Ciobanu, GarofiŢa Olivia Mateescu, Stelian ŞtefăniŢă Mogoantă
Synchronous gastric tumors, and, especially the presence of an adenocarcinoma and gastrointestinal stromal tumors, are less frequent. We present the case of a 75-year-old patient, with no gastrointestinal pathology in the medical history, who was admitted for marked asthenia, nausea, coffee grounds vomiting, inappetence, dizziness, weight loss and periodical epigastralgias. The clinical and imagistic examinations highlighted an ulcerative, infiltrative, bleeding tumor formation, present on the anterior side and subcardially on the small curvature...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28522781/laparoscopic-gastric-resections-with-per-oral-specimen-extraction-in-treatment-of-intramural-gastric-tumors
#10
Maciej Stanek, Piotr Major, Mateusz Wierdak, Michał Pędziwiatr, Dorota Radkowiak, Anna Zychowicz, Andrzej Budzyński
AIM: The goal of this work was to present our experiences and results of treatment of gastric tumors using the per oral specimen extraction (POSE) technique. MATERIAL AND METHODS: A retrospective analysis a group of patients treated with laparoscopic stomach wedge resection of gastrointestinal stromal tumor (GIST). During that time 50 patients underwent laparoscopy due to the suspicion of GIST. In 12 patients resected material was removed endoscopically per os (POSE)...
February 28, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/28521476/differentiation-between-gastrointestinal-schwannomas-and-gastrointestinal-stromal-tumors-by-computed-tomography
#11
Ming-Yan He, Rong Zhang, Zhenpeng Peng, Yin Li, Ling Xu, Mengjie Jiang, Zi-Ping Li, Shi-Ting Feng
The aim of the present study was to identify computed tomography (CT) features to assist in differentiating gastrointestinal schwannomas from gastrointestinal stromal tumors (GISTs). CT images of gastrointestinal schwannomas (n=15) and GISTs (n=50) were analyzed. The absolute CT values of tumor/aorta during plain scan/arterial phase/venous phase were recorded as tumor plain scan (Tp)/aorta plain scan (Ap), tumor arterial phase (Ta)/aorta arterial phase (Aa) and tumor venous phase (Tv)/aorta venous phase (Av), respectively, and normalized CT values of the three phases were calculated as Sp=Tp/Ap, Sa=Ta/Aa and Sv=Tv/Av, respectively...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28512414/an-intra-abdominal-desmoid-tumor-embedded-in-the-pancreas-preoperatively-diagnosed-as-an-extragastric-growing-gastrointestinal-stromal-tumor
#12
Mari Mizuno, Yoshiaki Kawaguchi, Aya Kawanishi, Yohei Kawashima, Atsuko Maruno, Masami Ogawa, Mifuji Tomioku, Daisuke Furukawa, Kazuhito Nabeshima, Kenji Nakamura, Kenichi Hirabayashi, Tetsuya Mine
A 45-year-old woman was found to have a pancreatic tumor by abdominal ultrasound performed for a medical check-up. Abdominal contrast-enhanced computed tomography showed a hypovascular tumor measuring 30 mm in diameter in the pancreatic tail. Endoscopic ultrasound-guided fine needle aspiration was performed. An extragastric growing gastrointestinal stromal tumor was thereby diagnosed preoperatively, and surgical resection was planned. Laparoscopic surgery was attempted but conversion to open surgery was necessitated by extensive adhesions, and distal pancreatectomy, splenectomy, and partial gastrectomy were performed...
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28506521/role-of-imaging-in-response-assessment-and-individualised-treatment-for-sarcomas
#13
H Choi
The first systematic response evaluation criteria were established by WHO, based on the tumor size changes shortly after the computed tomography (CT) technique became available to the daily practice. RECIST, a simplified version of WHO criteria, and its newer version, RECIST1.1 are the currently available international response evaluation criteria in solid tumors and remains based on tumor size changes. While the introduction of molecularly targeted drugs has significantly improved the survival in patient with sarcomas, the evaluation of tumor response has become more complicated...
May 12, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28505624/spectral-computed-tomography-imaging-of-gastric-schwannoma-and-gastric-stromal-tumor
#14
Jianli Liu, Yanjun Chai, Junlin Zhou, Chi Dong, Wenjuan Zhang, Bin Liu
Gastric schwannomas (GSs) and gastrointestinal stromal tumors (GSTs) are grossly similar submucosal neoplasms with different prognoses. We explored the value of spectral computed tomography (CT) to distinguish between them. METHODS: Patients diagnosed with GS or GST at Lanzhou University Second Hospital, China, between May 2013 and June 2015 were included retrospectively. The subjects underwent spectral CT examination before surgery and had histologically confirmed diagnosis of GS or GST...
May 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28501534/glomus-tumor-of-the-stomach-a-tumor-that-needs-to-be-differentiated-from-gastrointestinal-stromal-tumor
#15
Shuisheng Zhang, Jianwei Zhang, Chengfeng Wang
No abstract text is available yet for this article.
May 10, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28501252/atypical-colorectal-neoplasms
#16
REVIEW
Michael G Porter, Scott M Stoeger
Primary colorectal lymphoma, carcinoids (neuroendocrine tumors), and gastrointestinal stromal tumors comprise a small subset of all colorectal cancers. Their features are unique, and their treatment varies from that of colorectal adenocarcinoma. Appropriate identification is key in the management of these tumors.
June 2017: Surgical Clinics of North America
https://www.readbyqxmd.com/read/28494279/gastrointestinal-stromal-tumor-presenting-as-a-right-adnexal-mass-with-histopathologic-correlation
#17
Etan Dayan, Hongfa Zhu, Alan B Copperman, Sara Lewis, Amita Kamath
The authors report and discuss a rare case of a gastrointestinal stromal tumor (GIST) in a 35-year-old female, which was pre-procedurally characterized as a right ovarian mass by magnetic resonance imaging (MRI) features. This manuscript reviews the imaging and clinical features of GISTs with pathologic correlation, and emphasizes how this entity may present a diagnostic challenge in certain anatomic regions owing in large part to its exophytic nature. This case is unique among similarly reported cases in that there was a "claw sign" with the right ovary, which provided convincing evidence of its point of origin...
May 5, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28493803/soft-tissue-sarcomas-of-the-abdomen-and-pelvis-radiologic-pathologic-features-part-2-uncommon-sarcomas
#18
Angela D Levy, Maria A Manning, Markku M Miettinen
Soft-tissue sarcomas occurring in the abdomen and pelvis are an uncommon but important group of malignancies. Recent changes to the World Health Organization classification of soft-tissue tumors include the movement of gastrointestinal stromal tumors (GISTs) into the soft-tissue tumor classification. GIST is the most common intraperitoneal sarcoma. Liposarcoma is the most common retroperitoneal sarcoma, and leiomyosarcoma is the second most common. GIST, liposarcoma, and leiomyosarcoma account for the majority of sarcomas encountered in the abdomen and pelvis and are discussed in part 1 of this article...
May 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28490599/the-phenotype-of-sdhb-germline-mutation-carriers-a-nationwide-study
#19
Nicolasine D Niemeijer, Johannes A Rijken, Karin Eijkelenkamp, A N A van der Horst-Schrivers, Michiel N Kerstens, Carli M Tops, Anouk van Berkel, Henri J Timmers, Henricus P M Kunst, C Rene Leemans, Peter H Bisschop, Koen Ma Dreijerink, Marieke van Dooren, Jean-Pierre Bayley, Alberto M Pereira, Jeroen Jansen, Frederik J Hes, Erik Hensen, E P Corssmit
Objective Succinate dehydrogenase B subunit (SDHB) gene germline mutations predispose to pheochromocytomas, sympathetic paragangliomas, head and neck paragangliomas, and non-paraganglionic tumors (e.g. renal cell carcinoma, gastrointestinal stromal tumor and pituitary neoplasia). The aim of this study was to determine phenotypical characteristics of a large Dutch cohort of SDHB germline mutation carriers and assess differences in clinical phenotypes related to specific SDHB mutations. Design Retrospective descriptive study...
May 10, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28488171/clinical-and-pathological-characteristics-of-gastrointestinal-stromal-tumor-gist-metastatic-to-bone
#20
Kemal Kosemehmetoglu, Gulsah Kaygusuz, Karen Fritchie, Ovgu Aydin, Ozlem Yapicier, Oznur Coskun, Ersin Karatayli, Senay Boyacigil, Gulnur Guler, Sergulen Dervisoglu, Isinsu Kuzu
Our aim in this study was to describe the clinical, morphological, and molecular profile of gastrointestinal stromal tumor (GIST) metastatic to bone. We analyzed the morphological, phenotypic, and molecular characteristics of seven cases, and in addition reviewed 17 cases from literature. Sequence analysis of KIT and PDGFRA genes was possible for six cases. For the GIST cases with bone metastasis, the most common primaries were small intestine (29%), stomach (25%), and rectum (21%). Sites of bone metastases were vertebrae (11), pelvis (8), femur (8), ribs (6), humerus (5), skull (3), scapula (1), and mandible (1)...
May 9, 2017: Virchows Archiv: An International Journal of Pathology
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