The correlation between endoscopic and histopathological measurements in colorectal polyps

Area of Science:

• Gastroenterology
• Pathology
• Medical Imaging

Background:

• Colorectal adenomas ≥10 mm require rigorous follow-up due to increased neoplastic risk.
• Standardized polyp size assessment methods are currently lacking.
• Accurate size determination is critical for risk stratification and patient management.

Purpose of the Study:

• To evaluate the correlation between endoscopic and histopathological measurements of colorectal polyps.
• To identify the most appropriate method for clinical polyp size assessment.
• To improve risk stratification for patients with colorectal adenomas.

Main Methods:

• Retrospective analysis of endoscopic and histopathological polyp measurements.
• Prospective measurement using glass slides and magnified graticules.
• High-resolution digital scanning and tissue morphometry for a subset of cases.

Main Results:

• 352 polyps from 210 patients were analyzed.
• Endoscopic measurements were documented for 89% of adenomas, while histopathological measurements were available for only 22%.
• Significant differences between measurement methods led to 13% of patients being misclassified by risk.

Conclusions:

• Substantial discrepancies exist between endoscopic and histopathological polyp size measurements.
• Histopathological measurement remains the gold standard, but practical limitations like sample fragmentation must be considered.
• A hierarchical approach to measurements is needed to account for real-world clinical challenges.