[Histology of colonic polyps]

Area of Science:

• Gastroenterology
• Pathology
• Oncology

Context:

• Colorectal polyps represent a spectrum from benign growths to pre-cancerous lesions.
• Accurate classification is essential for patient management and cancer prevention.
• Emerging technologies complement, but do not replace, fundamental diagnostic methods.

Purpose:

• To present the modern classification of colorectal polyps.
• To discuss dysplastic and preneoplastic changes with new insights into predisposing factors.
• To highlight the enduring diagnostic value of morphological data.

Summary:

• The classification of colorectal polyps is updated, with a focus on dysplastic and preneoplastic changes.
• While advanced techniques like immunocytochemistry and DNA analysis are developing, basic microscopic and histological data are indispensable.
• Correct polyp orientation before histological examination is critical for precise diagnosis, including cancer assessment and depth of invasion.

Impact:

• Reinforces the foundational role of histopathology in diagnosing colorectal polyps.
• Provides practical guidance for pathologists to ensure comprehensive diagnostic information.
• Contributes to improved accuracy in colorectal cancer risk assessment and patient management.