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https://www.readbyqxmd.com/read/28732002/-gastrointestinal-stromal-tumor-in-young-pregnant-woman-case-report
#1
Walker Del Cid Jove Oblitas, Miguel Joseph Abril Barreda
Female patient, 28 years old, with a gestation of 14 weeks, natural and from Ilo-Moquegua. Came with a time of disease 4 days with hematemesis, melena, epigastric pain and syncope. Background of colonic resection for peritonitis due to trauma 20 years ago; upper gastrointestinal bleeding three years ago; paternal grandparents died of gastric cancer; chronic gastritis diagnosed from 19 year old. In laboratory studies hemoglobin of 9.2. In the upper gastrointestinal endoscopy was found absence of active upper gastrointestinal bleeding, a large tumor in proximal body toward greater curvature and posterior wall, 8 cm in diameter approximately, lobed appearance, with most of the mucosal surface unscathed is evidence, areas of ulceration of 2-3 mm covered with fibrin (biopsies taken), hard consistency, tent sign (positive) and cushionsign (negative)...
April 2017: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/28730217/novel-perspectives-on-gastrointestinal-stromal-tumors-gists
#2
Bogdan Stelian Mastalier Manolescu, Cristiana Gabriela Popp, Valentin Popescu, Dan Andraş, Sabina Andrada Zurac, Costin Berceanu, Aida TincuŢa Petca
Since they were described, gastrointestinal stromal tumors (GISTs) are, for pathologists and not only for them, a subject of controversy regarding histological origin, differentiation, nomenclature, malignant potential and prognosis. Before 1998, there were no certainties that GISTs were fundamentally different from other types of abdominal cancers in the big family of mesenchymal tumors. Before the discovery of KIT gene mutations, GISTs were most often classified as leiomyoma, leiomyosarcoma, leiomyoblastoma, and gastrointestinal autonomic nerve tumor...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28730166/impact-of-chromosomal-rearrangement-upon-dna-methylation-patterns-in-leukemia
#3
Hyang-Min Byun, Shahrooz Eshaghian, Dan Douer, Jonathen Trent, Guillermo Garcia-Manero, Ravi Bhatia, Kim Siegmund, Allen S Yang
Genomic instability, including genetic mutations and chromosomal rearrangements, can lead to cancer development. Aberrant DNA methylation occurs commonly in cancer cells. The aim of this study is to determine the effects of a specific chromosomal lesion the BCR-ABL translocation t(9:22), in establishing DNA methylation profiles in cancer. Materials and methods We compared DNA methylation of 1,505 selected promoter CpGs in chronic myelogenous leukemia (CML), acute lymphoblastic leukemia (ALL) with and without the Philadelphia chromosome t(9:22), CD34+ hematopoietic stem cells transfected with BCR-ABL, and other tumors without BCR-ABL (acute promyelocytic leukemia (APL) and gastrointestinal stromal tumors (GIST)...
2017: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/28723416/unravelling-the-pharmacologic-opportunities-and-future-directions-for-targeted-therapies-in-gastro-intestinal-cancers-part-2-neuroendocrine-tumours-hepatocellular-carcinoma-and-gastro-intestinal-stromal-tumours
#4
REVIEW
Cindy Neuzillet, Louis de Mestier, Benoît Rousseau, Olivier Mir, Mohamed Hebbar, Hemant M Kocher, Philippe Ruszniewski, Christophe Tournigand
Until the 1990s, cytotoxic chemotherapy has been the cornerstone of medical therapy for gastrointestinal (GI) cancers. Better understanding of the cancer cell molecular biology has led to the therapeutic revolution of targeted therapies, i.e. monoclonal antibodies or small molecule inhibitors directed against proteins that are specifically overexpressed or mutated in cancer cells. These agents, being more specific to cancer cells, were expected to be less toxic than conventional cytotoxic agents. However, their effects have sometimes been disappointing, due to intrinsic or acquired resistance mechanisms, or to an activity restricted to some tumour settings, illustrating the importance of patient selection and early identification of predictive biomarkers of response to these therapies...
July 16, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28722090/-evaluation-of-a-new-closure-technique-of-large-defects-after-endoscopic-full-thickness-resection
#5
Xiao Liu, Lizhou Dou, Yong Liu, Shun He, Yueming Zhang, Xinying Yu, Yan Ke, Xudong Liu, Ruigang Wang, Guiqi Wang
OBJECTIVE: To investigate the security and efficacy of a new endoscopic closure method of large defects after endoscopic full-thickness resection (EFTR) double purse-string suture using two endoloops and metallic clips via single-channel endoscopy. METHODS: Clinical data of 23 cases with submucosal tumors (SMT) who received endoscopic resection from June 2015 to July 2016 in our National Cancer Center were collected. For gastric and esophageal SMTs or the mucosa layer injured during submucosal tunneling endoscopic resection (STER), double purse-string suture was conducted after EFTR...
July 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28720665/targeted-exome-sequencing-of-krebs-cycle-genes-reveals-candidate-cancer-predisposing-mutations-in-pheochromocytomas-and-paragangliomas
#6
Laura Remacha, Iñaki Comino-Méndez, Susan Richter, Laura Contreras, Maria Currás-Freixes, Guillermo Pita, Rocío Letón, Antonio Galarreta, Rafael Torres-Pérez, Emiliano Honrado, Scherezade Jiménez, Lorena Maestre, Sebastian Moran, Manel Esteller, Jorgina Satrústegui, Graeme Eisenhofer, Mercedes Robledo, Alberto Cascon
Purpose: Mutations in Krebs cycle genes are frequently found in patients with pheochromocytomas/paragangliomas. Disruption of SDH, FH or MDH2 enzymatic activities lead to accumulation of specific metabolites, which give rise to epigenetic changes in the genome that cause a characteristic hypermethylated phenotype. Tumors showing this phenotype, but no alterations in the known predisposing genes, could harbor mutations in other Krebs cycle genes. <p>Experimental Design: We used downregulation and methylation of RBP1, as a marker of a hypermethylation phenotype, to select eleven pheochromocytomas and paragangliomas for targeted exome sequencing of a panel of Krebs cycle-related genes...
July 18, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28717701/cost-effectiveness-of-universal-hepatitis-b-virus-screening-in-patients-beginning-chemotherapy-for-sarcomas-or-gi-stromal-tumors
#7
Glorijoy Tan, Ke Zhou, Chee Hian Tan, David B Matchar, Mohamad Farid, Richard Quek, Joanne Ngeow
PURPOSE: The value of screening for hepatitis B virus (HBV) infection before chemotherapy for nonhematopoietic solid tumors remains unsettled. We evaluated the cost effectiveness of universal screening before systemic therapy for sarcomas, including GI stromal tumors (GISTs). PATIENTS AND METHODS: Drawing from the National Cancer Centre Singapore database of 1,039 patients with sarcomas, we analyzed the clinical records of 485 patients who received systemic therapy...
August 2016: Journal of Global Oncology
https://www.readbyqxmd.com/read/28698433/-molecular-target-therapy-for-soft-tissue-sarcoma
#8
Shunji Takahashi
Soft tissue sarcoma(STS)is one of the rare and intractable cancers, and most types of STS are not sensitive to chemotherapy. Development of specific molecular target therapy for each type of STS is necessary. There are specific chromosome translocations in 20-30% of STS, but their products are mostly transcriptional factors, and target therapy for those factors are difficult to develop. Trabectedin is an alkylating agent and is also inhibit function of transcriptional factors, and shows efficacy for translocation-related sarcoma(TRS)such as myxoid liposarcoma...
June 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28669336/the-safety-efficacy-and-therapeutic-potential-of-histone-deacetylase-inhibitors-with-special-reference-to-panobinostat-in-gastrointestinal-tumors-a-review-of-preclinical-and-clinical-studies
#9
Avineesh Singh, Preeti Patel, Jageshwar, Vijay Kumar Patel, Deepak Kumar Jain, M Kamal, Harish Rajak
Histone deacetylase inhibitors (HDACi) have demonstrated as an emerging class of anticancer drugs involved in regulation of gene expression and chromatin remodeling thus indicating valid targets for different types of cancer therapeutics. The pan-deacetylase inhibitor panobinostat (Farydac®, LBH589) is developed by Novartis Pharmaceuticals and a newly US FDA approved drug for the multiple myeloma. It is under clinical investigation for a range of hematological and solid tumors worldwide in both oral and intravenous formulations...
June 30, 2017: Current Cancer Drug Targets
https://www.readbyqxmd.com/read/28668437/usefulness-of-conventional-and-low-dose-hydro-ct-in-the-diagnosis-of-gastric-tumors-in-comparison-to-endoscopy
#10
Krzysztof Międzybrodzki, Urszula Zaleska-Dorobisz, Joanna Słonina, Violetta Sokolska, Aleksander Pawluś, Roman Badowski, Marek J Sąsiadek
PURPOSE: The aim of this retrospective study was to evaluate the usefulness of hydro-CT in the diagnosis of gastric tumors in comparison to endoscopy. MATERIAL AND METHODS: The study involved 40 patients with a diagnosis of gastric tumor established by histopathology who underwent endoscopy and conventional or low-dose hydro-CT. Hydro-CT images were retrospectively analyzed based on the consensus of two radiologists who were blinded to the endoscopy findings. The diagnostic accuracy of hydro-CT and endoscopy for the diagnosis of gastric tumors was evaluated using the results of the histopathological examination as the reference standard...
August 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28654152/race-specific-molecular-alterations-correlate-with-differential-outcomes-for-black-and-white-endometrioid-endometrial-cancer-patients
#11
Nicholas W Bateman, Elizabeth A Dubil, Guisong Wang, Brian L Hood, Julie M Oliver, Tracy A Litzi, Glenn D Gist, David A Mitchell, Brian Blanton, Neil T Phippen, Chunqiao Tian, Christopher M Zahn, David E Cohn, Laura J Havrilesky, Andrew Berchuck, Craig D Shriver, Kathleen M Darcy, Chad A Hamilton, Thomas P Conrads, G Larry Maxwell
BACKGROUND: The objective of this study was to identify molecular alterations associated with disease outcomes for white and black patients with endometrioid endometrial cancer (EEC). METHODS: EEC samples from black (n = 17) and white patients (n = 13) were analyzed by proteomics (liquid chromatography-tandem mass spectrometry) and transcriptomics (RNA-seq). Coordinate alterations were validated with RNA-seq data from black (n = 49) and white patients (n = 216)...
June 27, 2017: Cancer
https://www.readbyqxmd.com/read/28620891/population-pharmacokinetic-modeling-of-olaratumab-an-anti-pdgfr%C3%AE-human-monoclonal-antibody-in-patients-with-advanced-and-or-metastatic-cancer
#12
Gary Mo, John R Baldwin, Debra Luffer-Atlas, Robert L Ilaria, Ilaria Conti, Michael Heathman, Damien M Cronier
BACKGROUND AND OBJECTIVES: Olaratumab is a recombinant human monoclonal antibody that binds to platelet-derived growth factor receptor-α (PDGFRα). In a randomized phase II study, olaratumab plus doxorubicin met its predefined primary endpoint for progression-free survival and achieved a highly significant improvement in overall survival versus doxorubicin alone in patients with advanced or metastatic soft tissue sarcoma (STS). In this study, we characterize the pharmacokinetics (PKs) of olaratumab in a cancer patient population...
June 15, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28620007/von-hippel-lindau-and-hereditary-pheochromocytoma-paraganglioma-syndromes-clinical-features-genetics-and-surveillance-recommendations-in-childhood
#13
REVIEW
Surya P Rednam, Ayelet Erez, Harriet Druker, Katherine A Janeway, Junne Kamihara, Wendy K Kohlmann, Katherine L Nathanson, Lisa J States, Gail E Tomlinson, Anita Villani, Stephan D Voss, Joshua D Schiffman, Jonathan D Wasserman
Von Hippel-Lindau disease (vHL) is a hereditary tumor predisposition syndrome that places affected individuals at risk for multiple tumors, which are predominantly benign and generally occur in the central nervous system or abdomen. Although the majority of tumors occur in adults, children and adolescents with the condition develop a significant proportion of vHL manifestations and are vulnerable to delayed tumor detection and their sequelae. Although multiple tumor screening paradigms are currently being utilized for patients with vHL, surveillance should be reassessed as the available relevant clinical information continues to expand...
June 15, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28611556/therapeutic-interventional-endoscopic-ultrasound-based-on-rare-cases-in-indonesia-a-single-center-experience-in-unselected-patients
#14
Cosmas Rinaldi A Lesmana, Rino A Gani, Irsan Hasan, Andri Sanityoso Sulaiman, Laurentius A Lesmana
BACKGROUND: Endoscopic ultrasound (EUS) is still not widely available and has a barrier in most Southeast Asian countries due to lack of training program, high cost, and hospital investment. In this study, we would like to show the impact of therapeutic interventional EUS procedures in gastroenterology practice in Indonesia, which represents the biggest Southeast Asian country. METHODS: Patients who underwent interventional EUS procedure in Medistra Hospital were prospectively recruited within 1 year...
January 2017: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/28611108/wnt-%C3%AE-catenin-signaling-contributes-to-tumor-malignancy-and-is-targetable-in-gastrointestinal-stromal-tumor
#15
Shan Zeng, Adrian M Seifert, Jennifer Q Zhang, Michael J Cavnar, Teresa S Kim, Vinod P Balachandran, Juan A Santamaria-Barria, Noah A Cohen, Michael J Beckman, Benjamin Medina, Ferdinand Rossi, Megan H Crawley, Jennifer K Loo, Joanna H Maltbaek, Peter Besmer, Cristina R Antonescu, Ronald P DeMatteo
Gastrointestinal stromal tumor (GIST) is the most common type of sarcoma and usually harbors either a KIT or PDGFRA mutation. However, the molecular basis for tumor malignancy is not well defined. While the Wnt/b-catenin signaling pathway is important in a variety of cancers, its role in GIST is uncertain. Through analysis of nearly 150 human GIST specimens, we found that some human GISTs expressed b-catenin and contained active, dephosphorylated nuclear b-catenin. Furthermore, advanced human GISTs expressed reduced levels of the Wnt antagonist DKK4...
June 13, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28583893/clinicopathologic-features-surgical-treatments-and-outcomes-of-small-bowel-tumors-a-retrospective-study-in-china
#16
Shuisheng Zhang, Cuiling Zheng, Yingtai Chen, Quan Xu, Jie Ma, Wei Yuan, Qinglong Jiang, Yajie Zhao, Jianwei Zhang, Xu Che, Chengfeng Wang, Xiaozhun Huang, Fang Chen, Nianchang Wang, Xiao Ma, Zhongmin Lan
BACKGROUND: Small bowel tumors are relatively rare. Accumulation of data regarding their clinical presentation, pathologic features, prognostic factors, treatment modalities, and outcome has been an issue. We summarize the clinicopathologic features and evaluate the long-term outcome of patients with small bowel tumors who underwent surgery. METHODS: This is a retrospective study of medical records of 456 patients with small bowel tumors treated surgically at a Cancer Hospital between 1999 and 2016...
June 2, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28567071/associating-liver-partition-and-portal-vein-ligation-for-staged-hepatectomy-a-surgical-technique-for-liver-resections
#17
Behnam Sanei, Saba Sheikhbahaei, Mohammad Hossein Sanei, Amin Bahreini, Hamid Reza Jafari
BACKGROUND: Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) is a novel surgical technique liver resection in traditionally nonresectable primary intrahepatic tumors or colorectal liver metastases. MATERIALS AND METHODS: From June 2013 to March 2014, patients with primary tumor of liver or colorectal tumors with liver metastasis were selected to evaluate whether they met the initial criteria for ALPPS procedure. RESULTS: Nine patients enrolled in the study with primary diagnoses of colon and rectosigmoid cancer, carcinoid tumor, gastrointestinal stromal tumor of small intestine, hepatocellular carcinoma, and pancreatic neuroendocrine tumor (PNET)...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28561935/clinicopathologic-characteristics-of-kit-and-protein-kinase-c-%C3%AE-expression-in-adenoid-cystic-carcinoma-comparison-with-chromophobe-renal-cell-carcinoma-and-gastrointestinal-stromal-tumor
#18
Cheol Keun Park, Won Kyu Kim, Hoguen Kim
AIMS: KIT overexpression is frequently observed in adenoid cystic carcinomas (AdCCs), chromophobe renal cell carcinomas (ChRCCs), and gastrointestinal stromal tumor (GISTs). Persistent KIT activation has been reported to be mediated by protein kinase C (PKC)-δ in a subset of colon cancers with wild-type KIT overexpression and by PKC-θ in GISTs with mutant KIT overexpression. To elucidate the clinical implications of PKC-δ and PKC-θ expression in KIT-expressing tumors, we investigated the expression of KIT, PKC-δ, and PKC-θ in AdCCs and ChRCCs in comparison to GISTs...
May 31, 2017: Histopathology
https://www.readbyqxmd.com/read/28535156/phase-ii-study-of-neoadjuvant-imatinib-in-large-gastrointestinal-stromal-tumours-of-the-stomach
#19
Yukinori Kurokawa, Han-Kwang Yang, Haruhiko Cho, Min-Hee Ryu, Toru Masuzawa, Sook Ryun Park, Sohei Matsumoto, Hyuk-Joon Lee, Hiroshi Honda, Oh Kyoung Kwon, Takashi Ishikawa, Kyung Hee Lee, Kazuhito Nabeshima, Seong-Ho Kong, Toshio Shimokawa, Jeong-Hwan Yook, Yuichiro Doki, Seock-Ah Im, Seiichi Hirota, Seokyung Hahn, Toshirou Nishida, Yoon-Koo Kang
BACKGROUND: Gastrointestinal stromal tumours (GISTs) with high-risk features have poor prognosis even if adjuvant treatment is given. Neoadjuvant imatinib may increase the cure rate by shrinking large GISTs and preserve organ function. METHODS: We conducted an Asian multinational phase II study for patients with gastric GISTs ≥10 cm. Patients received neoadjuvant imatinib (400 mg/day) for 6-9 months. The primary end point was R0 resection rate. RESULTS: A total of 56 patients were enroled in this study...
June 27, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28528977/imatinib-induces-autophagy-via-upregulating-xiap-in-gist882%C3%A2-cells
#20
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
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