Algorithm Colonos
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DavAlgorithm Colonos
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DavCOLONOSCOPIC SURVEILLANCE INTERVALS – ADENOMAS
LOW RISK HIGH RISK POSSIBLE INCOMPLETE OR
1-2 adenomas 3-4 adenomas MULTIPLE
PIECEMEAL EXCISION OF
AND OR ≥5 adenomas
LARGE OR SESSILE ADENOMA
All <10mm Any adenoma ≥10mm
No villous features Villous features
No high grade dysplasia High grade dysplasia
D
C
A B
5-9: ≥10: Colonoscopy
Colonoscopy at Colonoscopy at at 3-6 months
Colonoscopy
Colonoscopy Colonoscopy 1 year <1 year*
at
at 55 years
years at 3 years
FINDINGS AT 1ST FOLLOW-UP:
No residual adenoma 12 months
FINDINGS AT 1ST FOLLOW-UP: Repeat colonoscopy FINDINGS AT 1ST FOLLOW-UP: Residual adenoma As for D**
No adenomas Colonoscopy at 3 yearly intervals. No clear guidelines FINDINGS AT 2ND FOLLOW-UP:
at 10 years or If the second follow-up Suggest: Normal or Low Risk As for A
FOBT every colonoscopy is normal or
Multiple As for C High risk As for B
1-2 years shows low-risk features,
consider increasing If Normal, Low As for B Multiple As for C
Low Risk As for A
the interval on an or High Risk Recurrent adenoma As for D**
High Risk As for B
Multiple As for C individualised basis. *Consider referral to a genetics service **Consider other options if relevant e.g. Surgical referral
• This algorithm is designed to be used in conjunction with the NHMRC approved Clinical Practice Guidelines for Surveillance Colonoscopy – in adenoma follow-up; following curative
resection of colorectal cancer; and for cancer surveillance in inflammatory bowel disease (December 2011) and is intended to support clinical judgement.
• Surveillance colonoscopy should be planned based on high-quality endoscopy in a well-prepared colon using most recent and previous procedure information when histology is known.
• Sessile serrated adenomas and serrated adenomas are followed up as for adenomatous polyps given present evidence, although they may progress to cancer more rapidly.
• Most patients ≥75 years of age have little to gain from surveillance of adenomas given a 10-20 year lead-time for the progression of adenoma to cancer. The finding of serrated
lesions may alter management.
• Small, pale, distal hyperplastic polyps only do not require follow-up. Consider sessile serrated polyposis if multiple proximal sessile serrated adenomas are found.
• In the absence of a genetic syndrome, family history does not influence surveillance scheduling which is based on patient factors and adenoma history.
• Follow-up of an advanced rectal adenoma by digital rectal examination, sigmoidoscopy or endo-rectal ultrasound should be considered independent of colonoscopic surveillance schedules.
Endorsed by:
Suggested citation: Barclay Karen, Cancer Council Australia Surveillance Colonoscopy Guidelines
Working Party. Algorithm for Colonoscopic Surveillance Intervals – Adenomas. 2013.
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