Serrated polyps of the colon.

Area of Science:

• Gastroenterology and Oncology
• Colorectal Cancer Research
• Gastrointestinal Pathology

Background:

• Historically, colonic polyps were categorized as hyperplastic or adenomatous, with only adenomas considered precancerous.
• Emerging evidence highlights that a subset of serrated polyps also possess the potential for malignant transformation.
• Serrated polyps encompass a diverse group, including hyperplastic polyps, sessile serrated adenomas (SSAs), traditional serrated adenomas, and mixed polyps.

Purpose of the Study:

• To underscore the significance of serrated polyps, particularly serrated adenomas, in the context of colorectal cancer.
• To inform physicians about the distinct characteristics and malignant potential of SSAs.
• To provide recommendations for the clinical management and surveillance of patients with serrated adenomas.

Main Methods:

• Review of existing literature and studies on serrated polyps and hyperplastic polyposis syndrome.
• Analysis of the distinct histology and molecular genetic profile of sessile serrated adenomas (SSAs).
• Correlation of SSA molecular findings with pathways of colon tumorigenesis, specifically microsatellite instability.

Main Results:

• Sessile serrated adenomas (SSAs) exhibit a predilection for the right colon.
• SSAs possess unique histological features and a molecular genetic profile linked to microsatellite instability-driven tumorigenesis.
• Evidence supports that serrated adenomas share malignant potential with conventional adenomas.

Conclusions:

• Physicians must be aware of serrated polyps and their association with colon cancer.
• Patients diagnosed with serrated adenomas should undergo colonoscopic follow-up surveillance at frequencies comparable to conventional adenomas.
• Proper clinical recognition and management of serrated polyps are crucial for effective colorectal cancer prevention and control.