<strong>J. Thomas LaMont, MD,</strong>  is a gastroenterologist and former GI Division Chief at Beth Israel Deaconess Medical Center. He is the Charlotte F. and Irving W. Rabb Distinguished Professor of Medicine at Harvard Medical School, and an Associate Editor at the New England Journal of Medicine.

NEJM Resident360 > Rotation Prep > Gastroenterology > Gastroenterology

Introduction

<div class="onepub-jats-front" id="10.1056/r360.i000903-front"><div class="onepub-jats-metadata two-column table"><div class="onepub-jats-row"><div class="onepub-jats-cell"><div class="onepub-jats-metadata-group"></div></div></div></div><div class="onepub-jats-metadata centered"></div></div><div class="onepub-jats-body" id="10.1056/r360.i000903-body"><div class="onepub-jats-section-container"><div class="onepub-introduction"><div class="onepub-jats-main-title"><h6 class="onepub-jats-title introduction">Introduction</h6></div><div class="onepub-jats-section-title"><h1 class="onepub-jats-title"><b>Introduction</b></h1></div><p>The field of gastroenterology covers diseases of the esophagus, stomach, small and large bowel, pancreas, and liver and biliary system. The diseases that affect these organs range from infections to autoimmune disorders, and treatment often requires a multidisciplinary team of clinicians including gastroenterologists and surgeons.</p><p><b>This rotation guide reviews the following gastrointestinal conditions encountered on inpatient wards:</b></p><ul class="onepub-jats-list-unordered"><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/acute-gi-bleeding/fast-facts" class="onepub-link-primary" target="_blank">Acute Gastrointestinal Bleeding</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/esophageal-disorders/fast-facts" class="onepub-link-primary" target="_blank">Esophageal Disorders and Gastroesophageal Reflux Disease (GERD)</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/acute-liver-failure-hepatitis/fast-facts" class="onepub-link-primary" target="_blank">Acute Liver Failure and Hepatitis</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/cirrhosis/fast-facts" class="onepub-link-primary" target="_blank">Liver Cirrhosis</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/ibd/fast-facts" class="onepub-link-primary" target="_blank">Inflammatory Bowel Disease (IBD)</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/biliary-disease/fast-facts" class="onepub-link-primary" target="_blank">Biliary Disease</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/pancreatitis/fast-facts" class="onepub-link-primary" target="_blank">Pancreatitis</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/diverticulitis/fast-facts" class="onepub-link-primary" target="_blank">Diverticulitis</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/intestinal-ischemia/fast-facts" class="onepub-link-primary" target="_blank">Intestinal Ischemia</a></p></li><li><p><a href="https://resident360.nejm.org/rotation-prep/gastroenterology/malabsorption/fast-facts" class="onepub-link-primary" target="_blank">Malabsorption</a><a href="https://www.asge.org/home/guidelines" class="onepub-link-primary" target="_blank"></a><tt><br class="onepub-jats-br"></tt><tt><br class="onepub-jats-br"></tt></p></li></ul><p><b>For advice on how to call a surgical consult, <a href="https://resident360.nejm.org/groups/resident360/content_items/advice-for-calling-a-surgical-consult-2" class="onepub-link-primary" target="_blank">click here</a>.</b></p><p><b>For a brief history of gastroenterology, <a href="https://resident360.nejm.org/content_items/279" class="onepub-link-primary" target="_blank">click here</a>.</b></p><p>If you are interested in a career in gastroenterology, see <a href="https://resident360.nejm.org/content_items/2761/" class="onepub-link-primary" target="_blank">Next Steps</a> for information about professional societies, meetings, and guidelines.</p><div class="onepub-grayBox"><p>This rotation guide was developed by a collaborative team of contributors, including:</p><p><b>Writers:</b> Leslie Chang, MD; Amanda Lim, MD; Angela Chen, MD; Rebecca Berger, MD; Andrea Merrill, MD (NEJM Fellows)<tt><br class="onepub-jats-br"></tt><b>Peer Reviewers:</b> Elliot Tapper, MD; Alison Goldin, MD; Christopher Huang, MD; Alan Bonder, MD <b><tt><br class="onepub-jats-br"></tt>Section Experts:</b>  J. Thomas LaMont, MD; Alan Bonder, MD (Hepatology)<b><tt><br class="onepub-jats-br"></tt>Senior Editor:</b>  Ole-Petter Hamnvik, MB BCh BAO, MMSc<tt><br class="onepub-jats-br"></tt><b>Last Updated:</b> January 2022 by Leslie Chang, MD </p></div></div></div></div>

Gastroenterology

Gastrointestinal Bleeding

Fast Facts

Research

Guidelines

Reviews

Additional Resources

Diverticulitis

Acute Liver Failure and Hepatitis

Liver Cirrhosis

Inflammatory Bowel Disease

Biliary Disease

Pancreatitis

Intestinal Ischemia

Esophageal Disorders and Gastroesophageal Reflux Disease

Malabsorption

Fulminant Ulcerative Colitis

Bleeding Esophageal Varices

Pseudomembranous Colitis Associated with Clostridium difficile

Crohn's Disease

Caput Medusae

Porcelain Gallbladder

Fistulizing Crohn's Disease

Emphysematous Cholecystitis

Chronic Ulcerative Colitis with Megacolon

Segmental Diverticulitis

Asterixis

Acute Mesenteric Infarction Associated with Atrial Fibrillation

Hydropic Gallbladder

Small-Intestinal Volvulus

Pneumoperitoneum

Mesenteric Abscess in Crohn's Disease

Oral Manifestation of Crohn’s Disease

Beans and Beaks

Abdominal-Wall Varices in the Budd–Chiari Syndrome

Mechanical Small-Bowel Obstruction

Acute Colonic Pseudo-Obstruction

Sugar to Reduce a Prolapsed Ileostomy

Nasogastric Intubation

Paracentesis