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https://www.readbyqxmd.com/read/27771376/clinicopathologic-characteristics-of-invasive-gastric-helicobacter-pylori
#1
Jonathan Dudley, Tad Wieczorek, Martin Selig, Hoiwan Cheung, Jeanne Shen, Robert Odze, Vikram Deshpande, Lawrence Zukerberg
Helicobacter pylori organisms have been observed deep within the stomach mucosa with an "intracellular" appearance, though the clinicopathologic characteristics of such cases remain poorly understood. We analyzed eighteen cases of deep mucosal H. pylori and associated clinical (sex, age, history of H. pylori infection, or proton pump inhibitor (PPI) use, medications, smoking, alcohol use, co-morbidities, treatment response treatment) and pathological (presence of lymphoid aggregates, intestinal metaplasia, PPI effect, active and/or chronic inflammation, quantity of invasive versus surface H...
October 19, 2016: Human Pathology
https://www.readbyqxmd.com/read/27738541/metastatic-gastrointestinal-adenocarcinoma-with-osteoblastic-activity-a-case-report-of-esophageal-and-colonic-primaries
#2
Brett Matthew Lowenthal, Ahmed S Shabaik, Mark A Valasek
Adenocarcinoma with osteoblastic metastases is classically seen in prostate, breast, and lung primaries. Less common primary sites include thyroid, kidney, and stomach. We present two cases of primary gastrointestinal adenocarcinoma with metastatic osteoblastic activity from two previously unreported sites. The first case represents an esophageal adenocarcinoma arising in a background of intestinal metaplasia that metastasized with osteoblastic activity to the deltoid muscle. The second case demonstrates a Stage IV sigmoid colon adenocarcinoma with osteoblastic metastases to the liver and lymph nodes...
2016: Case Reports in Pathology
https://www.readbyqxmd.com/read/27729732/impact-of-homeobox-genes-in-gastrointestinal-cancer
#3
EDITORIAL
Moon Kyung Joo, Jong-Jae Park, Hoon Jai Chun
Homeobox genes, including HOX and non-HOX genes, have been identified to be expressed aberrantly in solid tumors. In gastrointestinal (GI) cancers, most studies have focused on the function of non-HOX genes including caudal-related homeobox transcription factor 1 (CDX1) and CDX2. CDX2 is a crucial factor in the development of pre-cancerous lesions such as Barrett's esophagus or intestinal metaplasia in the stomach, and its tumor suppressive role has been investigated in colorectal cancers. Recently, several HOX genes were reported to have specific roles in GI cancers; for example, HOXA13 in esophageal squamous cell cancer and HOXB7 in stomach and colorectal cancers...
October 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27609464/loss-of-mesenchymal-bone-morphogenetic-protein-signaling-leads-to-development-of-reactive-stroma-and-initiation-of-the-gastric-neoplastic-cascade
#4
Sébastien A B Roy, Joannie M Allaire, Camille Ouellet, Faiza Maloum-Rami, Véronique Pomerleau, Étienne Lemieux, Jean-Philippe Babeu, Jasmin Rousseau, Marilène Paquet, Perrine Garde-Granger, François Boudreau, Nathalie Perreault
Bmps are morphogens involved in various gastric cellular functions. Studies in genetically-modified mice have shown that Bmp disruption in gastric epithelial and stromal cell compartments leads to the development of tumorigenesis. Our studies have demonstrated that abrogation of gastric epithelial Bmp signaling alone was not sufficient to recapitulate the neoplastic features associated with total gastric loss of Bmp signaling. Thus, epithelial Bmp signaling does not appear to be a key player in gastric tumorigenesis initiation...
September 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27604361/gastric-microbiota-and-carcinogenesis-the-role-of-non-helicobacter-pylori-bacteria-a-systematic-review
#5
Emanuel Dias-Jácome, Diogo Libânio, Marta Borges-Canha, Ana Galaghar, Pedro Pimentel-Nunes
BACKGROUND AND AIM: Helicobacter pylori is the strongest risk factor for gastric cancer. However, recent advances in DNA sequencing technology have revealed a complex microbial community in the stomach that could also contribute to the development of gastric cancer. The aim of this study was to present recent scientific evidence regarding the role of non-Helicobacter pylori bacteria in gastric carcinogenesis. METHODS: A systematic review of original articles published in PubMed in the last ten years related to gastric microbiota and gastric cancer in humans was performed...
September 2016: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/27573783/helicobacter-pylori-and-gastric-cancer-timing-and-impact-of-preventive-measures
#6
Marino Venerito, Riccardo Vasapolli, Peter Malfertheiner
Helicobacter pylori (H. pylori) is a Gram negative spiraliform bacterium that is commonly found in the stomach. H. pylori infection is still one of the world's most frequent infections, present in the stomachs of approximately one-half of the world's people. H. pylori infection is etiologically linked to histologic chronic active gastritis, peptic ulcer disease, and primary B-cell gastric lymphoma (gastric MALT lymphoma) and represents the major risk factor for the development of sporadic non-cardia gastric cancer (GC) of both intestinal and diffuse type...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27573764/distal-esophageal-adenocarcinoma-and-gastric-adenocarcinoma-time-for-a-shared-research-agenda
#7
Marnix Jansen, Nicholas A Wright
The key insight that sparked Darwin's theory of descent with modification was that he compared and contrasted differences between living and extinct species across time and space. He likely arrived on this theory in large part through his culinary experiences, set against the background of the rugged Patagonian landscape of Southern Argentina. We feel that further integration of research into gastric and esophageal adenocarcinoma may benefit both fields and similarly lead to a coherent understanding of cancer progression in the upper gastrointestinal tract across time and space...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27558191/case-of-gastric-intestinal-metaplasia-in-an-old-patient-with-previous-gastric-surgery
#8
Firas Kadurei, Mohamed Alboraie
An 87-year-old woman with multiple medical disorders presented with dyspeptic symptoms of long duration. She has a history of peptic ulcer disease for which she has partial gastrectomy (Billroth I) in the past. Oesophagogastroduodenoscopy (OGD) was performed which revealed erythematous mucosa in the lower part of the gastric remnant with areas of whitish mucosal patches in the distal stomach close to the gastroduodenal anastomosis. Biopsies were taken from the whitish mucosal patches and sent for histopathological examination...
August 24, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27498859/sox2-suppresses-gastric-tumorigenesis-in-mice
#9
Abby Sarkar, Aaron J Huebner, Rita Sulahian, Anthony Anselmo, Xinsen Xu, Kyle Flattery, Niyati Desai, Carlos Sebastian, Mary Anna Yram, Katrin Arnold, Miguel Rivera, Raul Mostoslavsky, Roderick Bronson, Adam J Bass, Ruslan Sadreyev, Ramesh A Shivdasani, Konrad Hochedlinger
Sox2 expression marks gastric stem and progenitor cells, raising important questions regarding the genes regulated by Sox2 and the role of Sox2 itself during stomach homeostasis and disease. By using ChIP-seq analysis, we have found that the majority of Sox2 targets in gastric epithelial cells are tissue specific and related to functions such as endoderm development, Wnt signaling, and gastric cancer. Unexpectedly, we found that Sox2 itself is dispensable for gastric stem cell and epithelial self-renewal, yet Sox2(+) cells are highly susceptible to tumorigenesis in an Apc/Wnt-driven mouse model...
August 16, 2016: Cell Reports
https://www.readbyqxmd.com/read/27491072/a-knockin-mouse-model-for-human-atp4ar703c-mutation-identified-in-familial-gastric-neuroendocrine-tumors-recapitulates-the-premalignant-condition-of-the-human-disease-and-suggests-new-therapeutic-strategies
#10
Oriol Calvete, Andrea Varro, D Mark Pritchard, Alicia Barroso, Marta Oteo, Miguel Ángel Morcillo, Pierfrancesco Vargiu, Steven Dodd, Miriam Garcia, José Reyes, Sagrario Ortega, Javier Benitez
By whole exome sequencing, we recently identified a missense mutation (p.R703C) in the human ATP4a gene, which encodes the proton pump responsible for gastric acidification. This mutation causes an aggressive familial type I gastric neuroendocrine tumor in homozygous individuals. Affected individuals show an early onset of the disease, characterized by gastric hypoacidity, hypergastrinemia, iron-deficiency anemia, gastric intestinal metaplasia and, in one case, an associated gastric adenocarcinoma. Total gastrectomy was performed as the definitive treatment in all affected individuals...
September 1, 2016: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/27447751/troy-is-expressed-in-human-stomach-mucosa-and-a-novel-putative-prognostic-marker-of-intestinal-type-gastric-cancer
#11
Franziska Wilhelm, Christine Böger, Sandra Krüger, Hans-Michael Behrens, Christoph Röcken
Epithelial stem cells of gastrointestinal tissues are characterized and controlled by an active Wnt signaling. Recently, the Wnt target gene Troy has been proposed as a neoplastic marker in the murine intestine. In this study, we explored the putative tumor biological significance of Troy in humans by using immunohistochemistry (104 cases), quantitative RT-PCR (50 cases) and cell culture experiments (MKN45, MKN74). In the non-neoplastic gastric mucosa, Troy was expressed by Muc5AC-positive foveolar epithelium, parietal cells, chief cells and cells of the intestinal metaplasia...
July 18, 2016: Oncotarget
https://www.readbyqxmd.com/read/27413289/histopathological-and-morphological-studies-on-natural-cysticercus-fasciolaris-infection-in-liver-of-wistar-rats
#12
Aman Dev Moudgil, Lachhman Das Singla, Kuldip Gupta, Prashant S Daundkar, Bhaskar Vemu
Descriptive morphology of multifocal hepatic cysts found in eight of forty five (17.78 %) Wistar rats sacrificed during pharmacological studies related to herbal formulations was studied. The creamish to white cysts were of varying sizes, ranging from 3-8 mm in diameter. Morphological studies of these cysts depicted the presence of metacestodes of Taenia taeniaeformis i.e. Cysticercus fasciolaris inside them. The scolex of metacestode revealed four suckers and rostellum armed with two distinct rows of characteristic pen knife shaped hooks (characteristics of taeniid cestodes)...
June 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27317852/risk-of-gastric-cancer-among-patients-with-intestinal-metaplasia-of-the-stomach-in-a-us-integrated-health-care-system
#13
Kavya M Reddy, Jonathan I Chang, Jiaxiao M Shi, Bechien U Wu
BACKGROUND & AIMS: Gastric intestinal metaplasia (GIM) is a common finding from routine endoscopies. Although GIM is an early step in gastric carcinogenesis, there is controversy regarding routine surveillance of patients with GIM in regions with a low prevalence of gastric cancer. We aimed to determine the incidence of gastric cancer among patients with GIM and risk factors for gastric cancer. METHODS: We performed a retrospective cohort study of patients from the Kaiser Permanente Southern California region diagnosed with GIM from 2000 through 2011...
October 2016: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27301112/-clinical-and-endoscopic-morphologic-and-immunohistochemical-features-of-gastric-ulcer-in-h-pylori-infected-individuals-receiving-cytotoxic-therapy
#14
O V Sazonova, I L Davydkin, A M Osadchuk, T A Gritsenko
THE PURPOSE OF THE STUDY: To determine the prognostic significance of the expression of molecules of PCNA, Bcl-2, NF-Kb and tachykinins (substance P, neurokinin A) in patients with gastric ulcer (CU) receiving cytotoxic therapy. MATERIALS AND METHODS: Total surveyed 90 patients divided into 3. equal groups. The first comparison group consisted of patients with chronic atrophic H. pylori-associated gastritis (CAG) (30 pers.). A second control group consisted of patients with gastric ulcer (30 pers...
2016: Experimental & Clinical Gastroenterology
https://www.readbyqxmd.com/read/27265923/primary-squamous-cell-carcinoma-of-the-stomach-a-case-report-and-review-of-the-literature
#15
REVIEW
Sheila Segura, Jacqueline Pender, Jessica Dodge, Steven L Brandwein, Hani El-Fanek
Primary gastric squamous cell carcinoma (PGSCC) is an exceedingly rare disease, accounting for 0.04% - 0.07% of all gastric cancers. First reported in 1895 by Rörig et al, less than 100 cases of PGSCC worldwide have been reported in the literature. These reports show PGSCC is more common in males (5:1 male to female ratio), and exhibits a peak incidence in the sixth decade of life. It may involve any portion of the stomach with predilection for the proximal stomach, especially along the lesser curvature. Although no clear pathogenesis of this tumor has been reported, several plausible theories have been proposed...
April 2016: Connecticut Medicine
https://www.readbyqxmd.com/read/27217900/a-review-of-the-clinicopathologic-characteristics-of-intestinal-metaplasia-in-gastric-mucosal-biopsies
#16
Olaejirinde Olaniyi Olaofe, Donatus Sabageh, Akinwunmi Oluwole Komolafe
INTRODUCTION: Although it is a well recognized premalignant lesion of the stomach, there is a dearth of information on the clinicopathologic features of gastric intestinal metaplasia in Nigerians. It is, therefore, necessary to study these features and their possible contribution to the development of gastric carcinoma in Nigerians. METHODS: All gastric biopsies with the histo-morphologic features of intestinal metaplasia diagnosed at the department of morbid anatomy and forensic medicine, Obafemi Awolowo university teaching hospitals complex, Ile-Ife, Nigeria between January 2006 and December 2010 were used for the study...
2016: Pan African Medical Journal
https://www.readbyqxmd.com/read/27182167/correlation-between-helicobacter-pylori-associated-gastric-diseases-and-colorectal-neoplasia
#17
Ying Qing, Min Wang, Ying-Min Lin, Dong Wu, Jing-Yu Zhu, Lang Gao, Yan-Yan Liu, Teng-Fei Yin
AIM: To explore the correlation between Helicobacter pylori (H. pylori)-associated gastric diseases and colorectal neoplasia. METHODS: Patients included in this study underwent a colonoscopy and esophago-gastro-duodenoscopy (EGD) along with histopathological measurement between March 2012 and March 2015 at Qi-Lu Hospital of Shandong University, who also had results of H. pylori detection. A total of 233 cases were selected. Demographic data, H. pylori infection status (including results of rapid urease tests and gastric mucosa pathological examinations) and histopathological examination results of gastric and colorectal mucosa were gathered and analyzed...
May 14, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27180366/correlation-between-endoscopic-and-histopathological-findings-in-gastric-lesions
#18
S Sharma, R Makaju, R Dhakal, B Purbey, R B Gurung, R Shrestha
Background Stomach is a common site for wide variety of lesions. The visualisation of the site with biopsy leads to the early detection of the pathologic process and appropriate therapy. Objectives The objective of this study is to correlate the histopathological pattern of endoscopic biopsies with distribution of gastric lesions according to age and sex. Method The retrospective study was carried out among 50 cases with endoscopic biopsies and histopathological assessment, received at Department of Pathology, Dhulikhel Hospital- Kathmandu University Hospital...
July 2015: Kathmandu University Medical Journal (KUMJ)
https://www.readbyqxmd.com/read/27160432/prevalence-of-helicobacter-pylori-in-gastric-hyperplastic-polyps
#19
Bela Horvath, Rish K Pai
Hyperplastic polyps of the stomach are routinely encountered during upper endoscopy and often arise in the setting of abnormal surrounding mucosa, particularly Helicobacter pylori, autoimmune gastritis, and reactive gastropathy. Not infrequently gastroenterologists fail to biopsy the surrounding mucosa, thus determining the underlying etiology of the gastric hyperplastic polyp can be difficult. Recently, the Rodger C. Haggitt Gastrointestinal Pathology Society published guidelines on the use of special stains...
May 8, 2016: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/27108552/-morphology-of-the-gastroesophageal-reflux-disease
#20
Ondřej Daum, Bohuslava Kokošková, Marian Švajdler
The present definition of gastroesophageal reflux disease is based on clinical criteria that are difficult to reproduce accurately. Pathologists are supposed to confirm the presence of morphological changes induced by gastroesophageal reflux. Traditional evaluation of injury, inflammatory and reactive changes of esophageal squamous epithelium lacks both sufficient sensitivity and specificity, and thus the modern diagnostic focuses on chronic metaplastic changes of esophageal mucosa defined as any mucosal type proximal to the upper border of oxyntic mucosa (also called fundic mucosa of the stomach)...
2016: Ceskoslovenská Patologie
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