Table 1:

Guideline intervals for colonoscopy surveillance in patients with a history of inflammatory bowel disease, colorectal cancer, and previous polyps.

Personal History of Inflammatory Bowel Disease
History	Interval Recommendation
≥ 8 years of left-sided or extensive disease	1–3 years
Primary Sclerosing Cholangitis	1 year
Active inflammation	1 year
History of dysplasia	1 year
Family history of colorectal cancer in first-degree relative < 50	1 year
Multiple pseudopolyps	1 year
Stricture	1 year

No personal history of inflammatory bowel disease or colon cancer
Finding	Interval Recommendation
Normal Colonoscopy, no FH colon cancer	10 years
Normal Colonoscopy, colon cancer in 1st-degree relative	5 years
Adenomas
1–2 less than 10 mm	5 years
3–10 less than 10 mm	3 years
Any adenoma > 10 mm	3 years
Personal history of polyposis syndrome	1 year
Inadequate preparation (fair or poor)	1 year
Incomplete colonoscopy (did not reach cecum)	Immediate Repeat

Personal History of Colon Cancer
History	Interval Recommendation
First colonoscopy after colectomy for cancer diagnosis	1 year
Index colonoscopy within 4 years of original cancer diagnosis	3 years
Index colonoscopy over 4 years from cancer diagnosis	5 years