Table 2.

Societal recommendations for endoscopic surveillance.

Society	Low Risk	Intermediate Risk	High Risk
	All other cases	Extensive colitis with mild/moderate inflammation, post-inflammatory polyps, family history of CRC in first-degree relatives >50 years	Stricture, dysplasia within past 5 yr PSC, extensive colitis with severe inflammation, family history of CRC in first-degree relatives <50 years
ACG 2019 [70]	Every 1–3 yr	Adjust intervals on the basis of previous colonoscopies and combined risk factors	Every year
AGA 2010 [114]	Every 1–3 yr After two negative exams	Every 1–2 yr	Every year
BSG 2010 [113]	Every 5 yr	Every 3 yr	Every year
ECCO 2017 [16]	Every 5 yr	Every 2–3 yr	Every year

CRC = colorectal carcinoma; PSC = primary sclerosing cholangitis; ACG = American College of Gastroenterology; AGA = American Gastroenterological Association; BSG = British Society of Gastroenterology; ECCO = European Crohn’s and Colitis Organisation.