[Proctoscopic versus histologic diagnosis of rectal polyps]

Area of Science:

• Gastroenterology
• Colorectal Surgery
• Pathology

Background:

• Rectal polyps are common findings during endoscopic examinations.
• Accurate differentiation between adenomatous and non-neoplastic polyps is crucial for patient management.
• Adenomatous polyps are considered premalignant lesions with the potential to develop into colorectal cancer.

Purpose of the Study:

• To evaluate the accuracy of endoscopic assessment in differentiating rectal adenomas from non-neoplastic polyps.
• To compare the macroscopic diagnosis of rectal polyps with histological findings.
• To determine the clinical implications of inaccurate endoscopic polyp classification.

Main Methods:

• Seventy-one rectal polyps were initially assessed based on their endoscopic appearance.
• The endoscopic diagnosis was subsequently compared with the definitive results of histological examination.
• Statistical analysis was performed to determine the concordance rate between endoscopic and histological diagnoses.

Main Results:

• The endoscopic diagnosis of rectal polyps was correct in only 62% of the cases reviewed.
• A significant discrepancy was observed between the macroscopic appearance and the histological classification of polyps.
• This suggests that visual inspection alone is insufficient for accurate polyp characterization.

Conclusions:

• Endoscopic appearance alone is not a reliable method for diagnosing rectal adenomas.
• Histological examination is essential for accurate polyp diagnosis.
• Given the premalignant nature of adenomas, prophylactic removal of all detected rectal polyps during proctoscopy is recommended to mitigate cancer risk.