Introduction — This topic includes links to society and government-sponsored guidelines from selected countries and regions around the world. We will update these links periodically; newer versions of some guidelines may be available on each society's website. Some societies may require users to log in to access their guidelines.

The recommendations in the following guidelines may vary from those that appear in UpToDate topic reviews. Readers who are looking for UpToDate topic reviews should use the UpToDate search box to find the relevant content.

International

●World Society of Emergency Surgery (WSES): Update of the guidelines for the management of acute colonic diverticulitis in the emergency setting (2020)

●WSES: Guidelines for management of intra-abdominal infections – The management of intra-abdominal infections from a global perspective (2017)

●WSES: Position paper for management or perforated sigmoid diverticulitis (2013)

●World Gastroenterology Organisation (WGO): Practice guidelines on diverticular disease (2007)

United States

●American Society of Colon and Rectal Surgeons (ASCRS): Clinical practice guidelines for the treatment of left-sided colonic diverticulitis (2020)

●European Association for Endoscopic Surgery (EAES) and Society of American Gastrointestinal and Endoscopic Surgeons (SAGES): 2018 Consensus conference on acute diverticulitis management – Evidence-based recommendations for clinical practice (published 2019)

●American College of Radiology (ACR): ACR Appropriateness Criteria on left lower quadrant pain – Suspected diverticulitis (2018)

●Society for Surgery of the Alimentary Tract (SSAT): Evidence-based current surgical practice for management of diverticulitis (2017)

●SSAT: Evidence-based current surgical practice on minimally invasive surgery for complicated diverticulitis (2017)

●American Gastroenterological Association (AGA) Institute: Guideline on the management of acute diverticulitis (2015)

●AGA Institute: Technical review on the management of acute diverticulitis (2015)

●SSAT: Evidence-based current surgical practice on colorectal emergencies – Perforated diverticulitis (operative and nonoperative management) (2014)

●Western Trauma Association (WTA): Critical decisions in trauma – Management of complicated diverticulitis (2012)

•WTA: Algorithm for management of complicated diverticulitis

Europe

●European Society of Coloproctology (ESCP): Guidelines for the management of diverticular disease of the colon (2020)

●European Association for Endoscopic Surgery (EAES) and Society of American Gastrointestinal and Endoscopic Surgeons (SAGES): 2018 Consensus conference on acute diverticulitis management – Evidence-based recommendations for clinical practice (published 2019)

United Kingdom

●National Institute for Health and Care Excellence (NICE): Guideline on diverticular disease – Diagnosis and management (2019)

●Royal College of Surgeons (RCS) of England: Commissioning guide – Colonic diverticular disease (2014)

●Association of Coloproctology of Great Britain and Ireland (ACPGBI): Position statement on elective resection for diverticulitis (2011)

Japan

●Japan Gastroenterological Association (JGA): Guidelines for colonic diverticular bleeding and colonic diverticulitis (2019)