• Disease
  • Helicobacter
  • Helicobacter Pylori
  • Yaron Niv

    Prominent publications by Yaron Niv

    KOL Index score: 13765

    BACKGROUND: The molecular mechanisms that underlie colorectal cancer (CRC) include microsatellite instability (MSI), chromosomal instability, and the CpG island methylator phenotype. There is evidence to suggest that CRC incidence varies among different ethnic populations worldwide. The authors of this report hypothesized that environmental factors and lifestyle differences among various ethnic groups may differentially influence the epigenetic regulation of tumor suppressor genes in ...

    Also Ranks for: Braf Mutation |  microsatellite instability |  mlh1 promoter methylation |  colorectal cancer |  ethnic groups
    KOL Index score: 12599

    BACKGROUND: The sensitive guaiac faecal occult blood test, Haemoccult SENSA (HOS; Beckman Coulter, Fullerton, CA, USA), is our standard screening test for significant colorectal neoplasia. We evaluated an automatically-developed, quantified human haemoglobin immunochemical faecal test, OC-MICRO (Eiken Chemical Co., Tokyo, Japan), to improve test specificity and so reduce the colonoscopy burden.

    AIM: To compare guaiac faecal occult blood test and immunochemical faecal test diagnostic ...

    Also Ranks for: Occult Blood |  guaiac test |  colorectal neoplasia |  immunochemical faecal |  sensitivity specificity
    KOL Index score: 12291

    OBJECTIVE: Recurrence of Helicobacter pylori infection after eradication is rare in developed countries and more frequent in developing countries. Most recurrent cases are attributed to recrudescence (recolonization of the same strain within 12 months) rather than to reinfection (colonization with a new strain after more than 12 months). The aim of the study was to analyze recurrence rates in developed and developing countries and to deduce the relative roles of recrudescence and ...

    Also Ranks for: Developing Countries |  pylori recurrence |  recrudescence reinfection |  urea breath |  12 months
    KOL Index score: 12194

    OBJECTIVES: Few studies have reported on the incidence and risk factors for pouchitis following colectomy and ileal pouch-anal anastomosis (IPAA) in patients with pediatric-onset ulcerative colitis (UC). We aimed to determine clinical predictors for the development of pouchitis following IPAA in this population.

    PATIENTS AND METHODS: We performed a retrospective chart review of all pediatric UC cases that were diagnosed at the Schneider Children's Medical Center of Israel between 1981 ...

    Also Ranks for: Ileal Pouch |  anal anastomosis |  ulcerative colitis |  ipaa patients |  pediatriconset uc
    KOL Index score: 12087

    OBJECTIVES: We evaluated the effect of the use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDS), and anticoagulants on the performance of immunochemical fecal occult blood test (I-FOBT).

    METHODS: A prospective, cross-sectional study of 1,221 ambulatory patients having total colonoscopy after preparing three I-FOBTs. Information regarding the use of medications was collected from the health medical organization (HMO) database. I-FOBT was analyzed with the OC-MICRO instrument ...

    Also Ranks for: Sensitivity Specificity |  occult blood |  immunochemical fecal |  anticoagulants aspirin |  colonoscopy colorectal
    KOL Index score: 11964

    BACKGROUND: The need to withhold acid suppression therapy while awaiting urea breath test results is a common clinical problem in symptomatic patients. It is unclear at present if the dose or type of proton pump inhibitor or the type of test meal govern the apparent masking effect of proton pump inhibitors on the urea breath test.

    AIM: To prospectively evaluate Helicobacter pylori detection rates during treatment with four different proton pump inhibitors, utilizing a high-dose citric ...

    Also Ranks for: Breath Test |  proton pump |  13c urea |  helicobacter pylori |  false negative
    KOL Index score: 11007

    OBJECTIVE: The incidence of ulcerative colitis ranges from 3 to 15 cases per 100,000 persons per year with a prevalence of 50-80 cases per 100,000, and the disease is 3-5 times more common among Jews. In Israel, Ashkenazi Jews have a higher incidence than Sephardi Jews, but a lower incidence than Ashkenazi Jews in the United States or Northern Europe. The aim of this study was to examine the prevalence, mean annual incidence, and clinical patterns of ulcerative colitis in a stable ...

    Also Ranks for: Ulcerative Colitis |  annual incidence |  ashkenazi jews |  100000 persons |  prevalence rate
    KOL Index score: 10677

    BACKGROUND: Faecal occult blood tests (FOBT) are faulted by low sensitivity for advanced adenomatous polyps (AAP). Quantified, immunochemical, haemoglobin (Hb)-specific immunochemical FOBT (I-FOBT) measurements are now used for colorectal screening.

    AIMS: To correlate adenoma characteristics to amount of faecal Hb lost and to evaluate sensitivity and specificity for AAP by faecal Hb development threshold used and number of I-FOBTs collected.

    METHODS: Three daily I-FOBTs were collected ...

    Also Ranks for: Colorectal Adenomas |  sensitivity specificity |  adenoma characteristics |  occult blood |  immunochemical faecal
    KOL Index score: 10634

    BACKGROUND AND STUDY AIMS: The Capsule Endoscopy Crohn's Disease Activity Index (CECDAI or Niv score) was devised to measure mucosal disease activity using video capsule endoscopy (VCE). The aim of the current study was to prospectively validate the use of the scoring system in daily practice.

    METHODS: This was a multicenter, double-blind, prospective, controlled study of VCE videos from 62 consecutive patients with isolated small-bowel Crohn's disease. The CECDAI was designed to ...

    Also Ranks for: Endoscopy Crohn |  correlation cecdai |  mucosa intestine |  disease small |  video capsule
    KOL Index score: 10573

    Patients with mucinous colorectal cancers characteristically present with advanced disease, however, the relationship between mucin production by colon cancer cells and their metastatic potential remains unclear. We therefore sought to define the relationship between mucin production by human colon cancer cells and metastatic ability by employing animal models of colon cancer metastasis. LS LiM 6, a colon carcinoma cell line with high liver metastasizing ability during cecal growth in ...

    Also Ranks for: Mucin Production |  metastatic potential |  colon cancer metastasis |  animal models |  carcinoma cells
    KOL Index score: 10542

    BACKGROUND AND STUDY AIMS: A second-generation capsule endoscopy system, using the PillCam Colon 2, was developed to increase sensitivity for colorectal polyp detection compared with the first-generation system. The performance of this new system is reported.

    PATIENTS AND METHODS: In a five-center feasibility study, second-generation capsule endoscopy was prospectively compared with conventional colonoscopy as gold standard for the detection of colorectal polyps and other colonic ...

    Also Ranks for: Generation Colon |  patients polyps |  capsule compared |  sensitivity specificity |  gold standard
    KOL Index score: 10370

    BACKGROUND: The guaiac faecal occult blood test (G-FOBT), HemoccultSENSA, is sensitive for significant neoplasms [colorectal cancer (CRC), advanced adenomatous polyps (AAP)], but faulted by non-specificity for human haemoglobin (Hb). Quantified, Hb- specific, immunochemical faecal occult blood tests (I-FOBT) are now used.

    AIMS: To (i) compare I-FOBT and G-FOBT efficacy in identifying significant neoplasms and colonoscopy needs for positive tests and (ii) examine number of I-FOBTs needed ...

    Also Ranks for: Colorectal Neoplasms |  occult blood |  sensitivity specificity |  guaiac test |  immunochemical faecal
    KOL Index score: 10292

    OBJECTIVES: Infection with Helicobacter pylori, particularly with strains positive for CagA protein, increases the risk of gastric adenocarcinoma. Few studies have explored the possible association between H. pylori infection and colorectal cancer. This study evaluated whether the seroprevalence of CagA in H. pylori-infected patients affected risk for colorectal cancer independently of H. pylori status.

    METHODS: In this study, we tested serum IgG antibodies against H. pylori (ELISA) and ...

    Also Ranks for: Colorectal Cancer |  pylori caga |  bacterial antigens |  patients risk |  neoplasms helicobacter
    KOL Index score: 10286

    BACKGROUND: To the authors' knowledge, little work has been done concerning adolescent precursors for gastroesophageal cancer. In the current study, the association of adolescent overweight as well as socioeconomic status (SES) with the incidence of esophageal adenocarcinoma (EAC), gastroesophageal junction adenocarcinoma (GEJAC), and noncardia gastric cancer (NCGC) was evaluated.

    METHODS: Body mass index (BMI) was measured in 1 million Israeli adolescent males who underwent a general ...

    Also Ranks for: Socioeconomic Status |  esophageal adenocarcinoma |  risk ncgc |  adolescent body |  cancer cases


    Yaron Niv: Influence Statistics

    Sample of concepts for which Yaron Niv is among the top experts in the world.
    Concept World rank
    retention portal hypertension #1
    accidents injuries ibd #1
    brafwild #1
    cecum small stomach #1
    29 nonibd cases #1
    18 heterozygosity #1
    fobt neoplasms #1
    aspirin nsaids threshold #1
    preparation hospitalized patients #1
    health medical organization #1
    bat mab #1
    pylori muc5ac expression #1
    placebo nwm #1
    patients macrolide exposure #1
    aortic atheroma 95 #1
    equivalent sensitivity gfobt #1
    cla lev #1
    ncibs patients #1
    mucin hypothesis #1
    advanced aps sensitivity #1
    ttc previous exposure #1
    muc3 95 #1
    prevalence israeli #1
    eradication developed countries #1
    vce videos #1
    anticoagulants trend #1
    standard mucins #1
    hyperemesis gravidarum pylori #1
    5885 patients success #1
    agreement normal abnormal #1
    cilansetron performance #1
    64 relative risk #1
    combined pylori #1
    indications eradication #1
    poor preparation rating #1
    insertion hospitalization #1
    95 ifobts #1
    response ness #1
    31 623 patients #1
    msh6 mutation patients #1
    hddt amoxicillin #1
    hmsh2 hmsh6 pms2 #1
    aspirin nsaids time #1
    paraffinembedded microdomains #1
    roxythromycin higher eradication #1
    colonoscopy patients ifobts #1
    capsule activity score #1
    sepharose cl4b method #1
    central pylori laboratory #1
    secondary epigenetic #1

    Key People For Helicobacter Pylori

    Top KOLs in the world
    David Yates Graham
    helicobacter pylori gastric cancer duodenal ulcer
    Martin J Blaser
    helicobacter pylori campylobacter fetus gastric cancer
    Francis Mégraud
    helicobacter pylori gastric cancer european registry
    Guillermo I Perez PérezPérez
    helicobacter pylori gastric cancer bacterial antigens
    Peter Malfertheiner
    helicobacter pylori gastric cancer chronic pancreatitis
    Ernst Johan Kuipers
    helicobacter pylori colorectal cancer atrophic gastritis

    Yaron Niv:Expert Impact

    Concepts for whichYaron Nivhas direct influence:Helicobacter pylori,  Colorectal cancer,  Ulcerative colitis,  Capsule endoscopy,  Gastric cancer,  Pylori infection,  Mucin expression,  Crohn disease.

    Yaron Niv:KOL impact

    Concepts related to the work of other authors for whichfor which Yaron Niv has influence:Colorectal cancer,  Helicobacter pylori,  Inflammatory bowel disease,  Capsule endoscopy,  Ulcerative colitis,  Small bowel.



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    Tel Aviv University, Ministry of Health, Israel (Yaron Niv) | The Israeli National Program for Quality Indicators, Ministry of Health, Jerusalem, Israel. | Ariel University, Ministry of Health, Ariel, Israel. | Division of Gastroenterology, Rabin Med