US task force consensus on serrated polyposis: clear the colon, survey closely, screen relatives

Design

Review and consensus statement by the US Multi-Society Task Force on Colorectal Cancer

Population

Individuals with serrated polyposis syndrome and their first-degree relatives

Primary outcome

Recommendations on diagnosis, surveillance, surgery and family screening

Effect

Clear colon and survey frequently; surgery for cancer or unmanageable burden; screen first-degree relatives; limited germline testing

The US Multi-Society Task Force on Colorectal Cancer has published a review and consensus statement on serrated polyposis syndrome. It describes the syndrome as the most common polyposis syndrome, and one that often goes unrecognised.

Diagnosis uses World Health Organization clinical criteria based on the size, cumulative lifetime number and location of serrated polyps. People with the syndrome have increased risk of both prevalent and future colorectal cancer. The statement recommends meticulous inspection, clearing the colon of polyps and frequent surveillance colonoscopy; surgery is for those with cancer or a polyp burden expert endoscopists cannot manage. No common germline variant has been found, so germline testing is indicated only when a patient meets criteria for a known hereditary syndrome. First-degree relatives are at increased risk and should have screening colonoscopy.

For endoscopists, the practical change is to recognise the syndrome — which depends on looking across reports — and to treat it as a high-risk condition with a family dimension. The specific surveillance intervals and relative-screening ages are in the full statement and should be checked there.

• Consider serrated polyposis syndrome in any patient with multiple serrated polyps, using WHO criteria.
• Aim to clear the colon of serrated polyps and arrange frequent surveillance after diagnosis.
• Refer for surgery if cancer is found or the polyp burden cannot be managed endoscopically.
• Offer screening colonoscopy to first-degree relatives.
• Reserve germline genetic testing for patients who meet criteria for a known hereditary syndrome.

Why it matters

A common, often missed syndrome carries cancer risk for the patient and their relatives.

Don't overread it

This is a consensus statement; check the full text for the exact surveillance intervals and screening ages.

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