Different standards for healthy screenees than patients in routine clinics?

Area of Science:

• Gastroenterology
• Oncology
• Preventive Medicine

Background:

• Colorectal adenomas have a low malignant transformation rate (less than 5%).
• Current knowledge of adenoma natural history is insufficient to selectively remove only those with malignant potential.
• Sessile serrated polyps (SSPs), previously considered benign, are now recognized for molecular similarities to cancer, prompting removal recommendations.

Purpose of the Study:

• To evaluate the necessity and risk-benefit balance of colorectal polypectomies, particularly for sessile serrated polyps.
• To question the current practice of widespread adenoma removal given the low rate of malignancy.
• To assess the evidence supporting the removal of SSPs in the context of screening versus symptomatic patient care.

Main Methods:

• Review of current literature on colorectal adenoma and sessile serrated polyp natural history.
• Analysis of risk-benefit ratios for polypectomy procedures, considering complication rates.
• Comparison of evidence standards for screening colonoscopies versus routine clinical practice.

Main Results:

• A significant proportion of polypectomies (estimated 95%) may be unnecessary, exposing patients to procedural risks without clear oncological benefit.
• Sessile serrated polyps present unique challenges due to their location, appearance, and higher perforation risk during removal.
• The evidence base for routine SSP removal in screening settings is less robust than for symptomatic patients.

Conclusions:

• The current approach to colorectal polyp removal warrants re-evaluation to optimize patient safety and resource allocation.
• Further research is needed to clarify the natural history and precise cancer prevention benefits of sessile serrated polyps.
• Distinguishing between screening and diagnostic colonoscopy indications may necessitate different evidence thresholds for intervention.