Table 2.

Surveillance intervals and strategies

High risk (annually)Intermediate risk (every 3 y)Low risk (every 5 y)
Risk-stratified intervals
NICE, ECCO, and BSG (85–87)Pancolitis with moderate to severe inflammation; strictures or dysplasia within past 5 y (±surgery), PSC, or family history of CRC in first degree relative > 50 yPancolitis with active inflammation (endoscopic or histologic); presence of pseudopolyps or family history of CRC in first-degree relative > 50 yPancolitis without inflammation (endoscopic or histology); left-sided UC or CD of similar extent (i.e., <50% mucosa involved)a
Nonstratified intervals
ASGE, ACG, and AGA (78, 88, 89)Active inflammation (any severity), anatomic abnormalities (foreshortened colons, strictures or pseudopolyps), history of dysplasia, PSC, or family history of CRC in first-degree relative (irrespective of age)Extension to 1 to 3 years considered after 2 consecutive negative surveillance colonoscopies and no inflammation (no specification on how to lengthen interval)No recommendation to extend to 5-y intervals
  • Abbreviations: ACG, American College of Gastroenterology; AGA: American Gastroenterology Association; ASGE, American Society of Gastrointestinal Endoscopy; BSG, British Society of Gastroenterology; CD, Crohn disease; CRC, colorectal cancer; ECCO, European Crohn's and Colitis Organization; NICE, National Institute of Health and Clinical Excellence; UC, ulcerative colitis.

  • aECCO guidelines do not have specific low-risk criteria. Low risk is those without high or intermediate risk.