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Gastrointestinal mesenchymal tumor

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https://www.readbyqxmd.com/read/29312652/tyrosine-kinase-inhibitor-sensitive-pdgfr%C3%AE-mutations-in-gist-two-cases-and-review-of-the-literature
#1
Pieter A Boonstra, Jourik A Gietema, Albert J H Suurmeijer, Matthew R Groves, Fernando de Assis Batista, Ed Schuuring, Anna K L Reyners
Gastrointestinal stromal tumors (GISTs) are rare mesenchymal malignancies of the gastrointestinal tract. Most GISTs harbor a c-KIT (80%) or a PDGFRα (10%) mutation that leads to constitutive activation of the tyrosine kinase receptor. Response to treatment with tyrosine kinase inhibitors (TKIs) is dependent on mutational status of the tumor. The most common mutation in PDGFRα, D842V, is known to be imatinib resistant. Almost all other PDGFRα mutations are imatinib sensitive. We describe two patients with a PDGFRα exon 18 mutated GIST responding to treatment with TKIs...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29310354/mesenteric-fibromatosis-after-resection-for-gastrointestinal-stromal-tumor-of-stomach-a-case-report
#2
Yiming Chu, Qingqu Guo, Dan Wu
RATIONALE: Gastrointestinal stromal tumor and mesenteric fibromatosis are rare mesenchymal tumors. Coexistence of these two diseases is uncommon, with only a few anecdotal reports of individuals. PATIENT CONCERNS: Clinical data and treatment of a 43-year-old man with subsequent mesenteric fibromatosis from gastrointestinal stromal tumor are summarized. The Ethics Committee of The Second Affiliated Hospital, College of Medicine, Zhejiang University approved this study, and the patient provided written informed consent form...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29297486/mesenchymal-tumors-of-the-prostate
#3
Jesse K McKenney
Mesenchymal tumors of the prostate are rare but often cause considerable diagnostic difficulty when encountered. These may be either benign or malignant and can arise within the prostate gland or in adjacent tissues. This review covers prostatic stromal proliferations (prostatic stromal tumor of uncertain malignant potential and stromal sarcoma), solitary fibrous tumor, myofibroblastic proliferations, smooth muscle neoplasms (leiomyoma and leiomyosarcoma), gastrointestinal stromal tumor, schwannoma, rhabdomyosarcoma, sarcomatoid carcinoma, postradiation sarcoma, and mixed epithelial stromal tumor of the seminal vesicle...
January 2018: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/29275234/a-case-of-gastric-glomus-tumor-resection-using-laparoscopy-endoscopy-cooperative-surgery-lecs
#4
Taro Aoba, Takehito Kato, Kazuhiro Hiramatsu, Yoshihisa Shibata, Motoi Yoshihara, Naoya Yamaguchi, Tadahiro Kamiya
INTRODUCTION: Gastric glomus tumors are rare submucosal mesenchymal tumors. Because gastric glomus tumors are submucosal tumors and resemble gastrointestinal stromal tumors (GISTs), preoperative diagnosis is difficult. We present a case of gastric glomus tumor that was removed by laparoscopy endoscopy cooperative surgery (LECS). CASE PRESENTATION: A 67-year-old female was taken to the emergency room at our hospital due to epigastric pain. An upper gastrointestinal endoscopy revealed a submucosal tumor (SMT) located in the lesser curvature of the upper body of the stomach...
December 16, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29245294/gastrointestinal-stromal-tumor-of-unusual-phenotype-after-imatinib-treatment-a-case-report-and-diagnostic-utility-of-etv1-mrna-in-situ-hybridization
#5
Minsun Jung, Sung-Hye Park, Yoon Kyung Jeon, Jae-Kyung Won, Han-Kwang Yang, Woo Ho Kim
RATIONALE: Gastrointestinal stromal tumor (GIST) is the most common tumor of mesenchymal origin in gastrointestinal tract. Immunohistochemical (IHC) staining combined with a typical morphology is used for the diagnosis of GIST. Typically, IHC staining for v-kit Hardy-Zuckerman 4 feline sarcoma viral oncogene (KIT) and discovered on GIST-1(DOG1) is positive in almost all GISTs. However, imatinib mesylate, a specific inhibitor of KIT tyrosine kinase, frequently involves changes in the morphology and IHC staining of GIST, impeding the diagnosis...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29245287/an-inflammatory-myofibroblastic-tumor-in-the-transplanted-liver-displaying-quick-wash-in-and-wash-out-on-contrast-enhanced-ultrasound-a-case-report
#6
Jing Shang, Yun-Yue Wang, Ying Dang, Xin-Juan Zhang, Yan Song, Li-Tao Ruan
RATIONALE: Inflammatory myofibroblastic tumor (IMT) is an uncommon mesenchymal neoplasm, and its presence in a grafted liver is exceedingly rare. PATIENT CONCERNS: A 54-year-old woman was admitted to our hospital with a half-month history of intermittent melena. She had undergone deceased-donor liver transplantation (LT) for hepatitis B virus related liver cirrhosis without hepatocellular carcinoma 5 months previously. DIAGNOSIS: Laboratory examination showed impaired liver and renal functions and Epstein-Barr virus (EBV) infection, but tumor markers within normal ranges...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29234186/primary-leiomyosarcoma-of-the-mesentery-a-case-report
#7
Varsha Dalal, Manveen Kaur, Reetika Menia, Fouzia Siraj, Amar Bhatnagar, Usha Agrawal
Mesenteric masses are infrequent lesions ranging from benign cysts to aggressive malignancies and often present a diagnostic and therapeutic challenge. The mesentery is a frequent recipient of metastases from the gastrointestinal tract, pancreas, and biliary cancers. Primary mesenteric tumors are relatively rare, mostly mesenchymal in origin and benign in nature. Examples include gastrointestinal stromal tumors and smooth muscle tumors. We describe a 50-year-old woman, who presented with a lump in the left hypochondrium along with altered bowel habits of 2 years' duration...
September 2017: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29227120/-molecular-mechanisms-of-primary-and-secondary-resistance-molecular-genetic-features-and-characteristics-of-kit-pdgfra-non-mutated-gists
#8
Alena Kalfusová, Roman Kodet
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors of the gastrointestinal tract. Most of them arise due to activating mutations in KIT (75 - 85 %) or PDGFRA (less than 10 %) genes. Identification of the activating mutations in KIT and PDGFRA genes, which code for receptor tyrosine kinases (RTKs), has improved the outcome of targeted therapy of metastatic, unresectable or recurrent GISTs. Primary and/or secondary resistance represents a significant problem in the targeted therapy by Imatinib mesylate (IM) in patients with GIST...
2017: Ceskoslovenská Patologie
https://www.readbyqxmd.com/read/29204252/paradoxical-expression-pattern-of-the-epithelial-mesenchymal-transition-related-biomarkers-cd44-slug-n-cadherin-and-vsig1-glycoprotein-a34-in-gastrointestinal-stromal-tumors
#9
Attila Kövecsi, Simona Gurzu, Zoltan Szentirmay, Zsolt Kovacs, Tivadar Jr Bara, Ioan Jung
AIM: To evaluate the immunohistochemical (IHC) expression of five biomarkers, commonly involved in epithelial mesenchymal/mesenchymal epithelial transition (EMT/MET), in gastrointestinal stromal tumors (GISTs). METHODS: In 80 consecutive GISTs the IHC examinations were performed using the EMT-related antibodies E-cadherin, N-cadherin, SLUG, V-set and immunoglobulin domain containing 1 (VSIG1) and CD44. RESULTS: The positivity rate was 88.75% for SLUG, 83...
November 15, 2017: World Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/29202476/stromal-lkb1-deficiency-leads-to-gastrointestinal-tumorigenesis-involving-the-il-11-jak-stat3-pathway
#10
Saara Ollila, Eva Domènech-Moreno, Kaisa Laajanen, Iris Pl Wong, Sushil Tripathi, Nalle Pentinmikko, Yajing Gao, Yan Yan, Elina H Niemelä, Timothy C Wang, Benoit Viollet, Gustavo Leone, Pekka Katajisto, Kari Vaahtomeri, Tomi P Mäkelä
Germline mutations in the gene encoding tumor suppressor kinase LKB1 lead to gastrointestinal tumorigenesis in Peutz-Jeghers syndrome (PJS) patients and mouse models; however, the cell types and signaling pathways underlying tumor formation are unknown. Here, we demonstrated that mesenchymal progenitor- or stromal fibroblast-specific deletion of Lkb1 results in fully penetrant polyposis in mice. Lineage tracing and immunohistochemical analyses revealed clonal expansion of Lkb1-deficient myofibroblast-like cell foci in the tumor stroma...
December 4, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29196941/gastric-calcifying-fibrous-tumor-manifesting-as-a-subepithelial-tumor
#11
Seokyoun Lee, Jaehoon Jahng, Weoncheol Han
A gastric subepithelial tumor is a common finding during upper gastric endoscopy. The differential diagnosis of such lesions is broad, and sometimes a rare disease can be diagnosed. A calcifying fibrous tumor (CFT) is a rare, benign mesenchymal tumor that usually affects children and young adults. To our knowledge, a CFT of the tubular gastrointestinal tract is very rare with fewer than 30 cases of gastric CFTs reported in the literature.
December 1, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/29187943/-rare-digestive-tumors-gastrointestinal-stromal-tumors-gists-about-a-case-of-small-bowel-location-and-literature-review
#12
Habib Bellamlih, Lamiae Bouimetarhan, Touriya Amil, Hassan En-Nouali, Naoufal Chouaib, Said Jidane, Mostafa Rafai, Ahmed Belkouch, Lahcen Belyamani
Gastrointestinal stromal tumors (GISTs) are a rare group of mesenchymal tumors mainly occurring in the gastrointestinal tract. Previously, GISTs were classified as smooth muscle tumors also known as leiomyomas, leiomyosarcomas or leiomyoblastomas. However, since the advent of immunohistochemistry, GISTs have been diagnosed on the basis of the identification of c-kit-positive cells. We here report a case of stromal tumor of the small intestine in order to analyze it in the light of literature data and imaging results, which may suggest prebiopsy diagnosis as well as its therapeutic and prognostic peculiarities...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29170162/classification-of-gastrointestinal-stromal-tumor-syndromes
#13
Priya Gopie, Lin Mei, Anthony C Faber, Steven R Grossman, Steven C Smith, Sosipatros Boikos
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors of the gastrointestinal tract, thought to derive from neoplastic outgrowth of the interstitial cells of Cajal. Building on recent advances in recognition, classification, and diagnosis, the past two decades have seen a changing paradigm with molecular diagnostics and targeted therapies. KIT and PDGFRA mutations account for 85-90% GIST carcinogenesis. However, the remaining 10-15% of GISTs which until recently were called KIT/PDGFRA wild type GISTs, have been found to have one of several mutations, including in the SDHA, B, C, D, BRAF and NF1 genes...
November 23, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/29169676/gastrointestinal-stromal-tumor-of-the-jejunum-with-active-bleeding-demonstrated-on-dual-energy-mdct-angiography-a-case-report
#14
Abdul Razik, Kumble S Madhusudhan, Abhishek Aggarwal, Rajesh Panwar, Deep N Srivastava
Gastrointestinal stromal tumor (GIST) is the most common mesenchymal tumor of the gastrointestinal tract and may occasionally present with acute gastrointestinal bleed (GIB). Multidetector computed tomography (MDCT) angiography is extremely useful in demonstrating the tumor as well as the presence of active hemorrhage, thereby guiding subsequent interventional or surgical management. We report a case of a 38-year-old man who presented with acute-onset melena and compensated shock, whose source of bleed remained elusive on endoscopy...
October 31, 2017: Current Problems in Diagnostic Radiology
https://www.readbyqxmd.com/read/29167690/synchronous-gists-associated-with-multiple-sporadic-tumors-a-case-report
#15
Danila Comandini, Azzurra Damiani, Alessandro Pastorino
Gastrointestinal stromal tumors (GISTs) are rare neoplasms, but they also represent the most common mesenchymal tumors of the gastrointestinal tract originating from the cell of Cajal. GIST incidence ranges around 1% of all gastrointestinal malignancies. Approximately 5% of all GISTs have a hereditary etiology. The remaining 95% of GISTs are considered sporadic events, with up to 75% of cases driven by a constitutional activation of the c-KIT proto-oncogene. GISTs are generally solitary lesions. Nonetheless, multiple sporadic GISTs can occur and present as synchronous or metachronous tumors, usually associated with familial GIST...
2017: Drugs in Context
https://www.readbyqxmd.com/read/29166513/primary-cutaneous-amelanotic-melanoma-and-gastrointestinal-stromal-tumor-in-synchronous-evolution
#16
Fernanda Teixeira Ortega, Rogério Nabor Kondo, Francine Milenkovich Belinetti, Mariana Onuki Okamura, Bruna Tuma
Gastrointestinal stromal tumor is rare digestive tract mesenchymal tumor, most often in the wall of the stomach. It is a benign neoplasm, but it can become malignant if not treated. We report a case of gastrointestinal stromal tumor that was discovered after abdominal ultrasonography during staging of a patient with primary cutaneous amelanotic melanoma. Mutation in the tyrosine kinase receptor could explain the development of two types of tumors in the same patient.
September 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/29152299/gastrointestinal-stromal-tumor-an-incidental-finding-during-laparoscopic-bariatric-surgery
#17
Shireesh Saurabh
Gastrointestinal stromal tumor (GIST) is the most common mesenchymal tumor of the gastrointestinal tract. Lack of clinical symptoms and findings on preoperative upper endoscopy makes its diagnosis difficult in bariatric patients. A laparoscopic resection of the gastric GIST during bariatric surgery is associated with good long-term prognosis.
November 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29133619/clinical-application-of-circulating-tumor-dna-in-the-genetic-analysis-of-patients-with-advanced-gist
#18
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/29120569/abdominal-ultrasound-%C3%A2-the-leading-method-in-duodenal-gist-diagnostics
#19
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/29115925/synchronous-occurrence-of-hereditary-gastric-adenocarcinoma-gastrointestinal-stromal-tumor-and-esophageal-small-cell-and-squamous-carcinoma-in-situ-an-extremely-rare-case-report
#20
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
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