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Dive into the research topics where John Mark B. Gubatan is active.

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Featured researches published by John Mark B. Gubatan.


Case reports in gastrointestinal medicine | 2016

Hemorrhage from Extra-Antral Gastric Antral Vascular Ectasia in a Patient with Duodenal Heterotopic Gastric Mucosa

John Mark B. Gubatan; Nathan Raines; Hasan Khosravi; Tracy Challies; Tyler M. Berzin

Gastric antral vascular ectasias (GAVE) have been increasingly recognized as an uncommon cause of chronic gastrointestinal bleeding and anemia, although their underlying pathogenesis is not completely well understood. Heterotopic gastric mucosa (HGM) has been reported to occur at various sites along the gastrointestinal tract and although relatively common, it is often asymptomatic. We report a case of a 60-year-old woman with a prior history of GAVE who developed melena and symptomatic anemia during her hospitalization following cardiac catheterization. Initial EGD demonstrated nonbleeding antral GAVE and a newly discovered duodenal mass. Duodenal mass biopsies were ultimately notable for HGM along with histologic features of extra-antral GAVE. The patient required blood transfusions and consequently had a small bowel endoscopy notable for fresh blood in the proximal small bowel. The patient underwent a small bowel push enteroscopy which demonstrated active bleeding of the duodenal mass and overlying oozing GAVE, which was cauterized with Argon-Plasma Coagulation with adequate hemostasis. We present for the first time a novel association between GAVE and HGM. Our case illustrates that extra-antral GAVE may occur with HGM in the duodenum. We explore potential mechanisms by which HGM may be involved in the pathogenesis of GAVE.


Digestive Diseases and Sciences | 2016

Cannabis Abuse Is Increasing and Associated with Increased Emergency Department Utilization in Gastroenterology Patients

John Mark B. Gubatan; Kyle Staller; Kenneth Barshop; Braden Kuo


Gastroenterology | 2017

Su1135 – Prevalence, Causes and Characteristics of Nonresponsive Celiac Disease

Mariana Urquiaga; Abhijeet Yadav; John Mark B. Gubatan; Brisas Flores; Shreya Amin; Katerina Byanova; Javier A. Villafuerte-Galvez; Satya Kurada; Daniel A. Leffler; Ciaran P. Kelly


Gastroenterology | 2017

AGA AbstractsSu1135 - Prevalence, Causes and Characteristics of Nonresponsive Celiac Disease

Mariana Urquiaga; Abhijeet Yadav; John Mark B. Gubatan; Brisas Flores; Shreya Amin; Katerina Byanova; Javier A. Villafuerte-Galvez; Satya Kurada; Daniel A. Leffler; Ciaran P. Kelly


Gastroenterology | 2017

Prevalence, Causes and Characteristics of Nonresponsive Celiac Disease

Mariana Urquiaga; Abhijeet Yadav; John Mark B. Gubatan; Brisas Flores; Shreya Amin; Katerina Byanova; Javier A. Villafuerte-Galvez; Satya Kurada; Daniel A. Leffler; Ciaran P. Kelly


Gastroenterology | 2017

Predictors for Positive Findings on EGD, Colonoscopy, and Biopsy in Non-Responsive Celiac Disease

Abhijeet Yadav; Mariana Urquiaga; Javier A. Villafuerte-Galvez; John Mark B. Gubatan; Brisas Flores; Shreya Amin; Katerina Byanova; Satya Kurada; Daniel A. Leffler; Ciaran P. Kelly


Gastroenterology | 2017

Cathelicidin Antimicrobial Peptide Links Vitamin D Levels to Histologic Remission in Patients with Ulcerative Colitis

John Mark B. Gubatan; Shuji Mitsuhashi; Maria Serena Longhi; Talia Zenlea; Laura Rosenberg; Simon C. Robson; Alan C. Moss


Clinical Gastroenterology and Hepatology | 2017

Response to Letter to Editor: Serum Vitamin D and Ulcerative Colitis Relapse

John Mark B. Gubatan; Alan C. Moss


Gastroenterology | 2016

Tu1951 Vitamin D Levels During Remission Are Associated With the Risk of Clinical Relapse in Patients With Ulcerative Colitis

John Mark B. Gubatan; Shuji Mitsuhashi; Talia Zenlea; Laura Rosenberg; Simon C. Robson; Alan C. Moss


Gastroenterology | 2014

Mo1122 Prevalence and Characterization of Cannabinoid Use in Patients With Gastrointestinal Disorders

John Mark B. Gubatan; Kyle Staller; Braden Kuo

Collaboration


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Abhijeet Yadav

Beth Israel Deaconess Medical Center

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Ciaran P. Kelly

Beth Israel Deaconess Medical Center

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Daniel A. Leffler

Beth Israel Deaconess Medical Center

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Javier A. Villafuerte-Galvez

Beth Israel Deaconess Medical Center

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Satya Kurada

Beth Israel Deaconess Medical Center

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Alan C. Moss

Beth Israel Deaconess Medical Center

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Laura Rosenberg

Beth Israel Deaconess Medical Center

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Shuji Mitsuhashi

Beth Israel Deaconess Medical Center

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