Effects of endoscopic sphincterotomy on biliary epithelium: a case-control study

Area of Science:

• Gastroenterology
• Hepatobiliary Surgery
• Surgical Pathology

Background:

• Endoscopic sphincterotomy (ES) is a common procedure for bile duct stones.
• Long-term effects of ES on biliary epithelium require further investigation.
• Assessing epithelial changes post-ES is crucial for understanding potential complications.

Purpose of the Study:

• To evaluate the long-term impact of endoscopic sphincterotomy (ES) on biliary epithelium.
• To determine if ES-induced changes are premalignant.
• To investigate the role of p53 immunocytology in detecting biliary atypia post-ES.

Main Methods:

• Prospective case-control study comparing 25 patients with prior ES to 25 controls.
• Brush cytology and p53 immunocytology of the biliary tree were performed.
• Patients were assessed at a median of 42 months post-ES.

Main Results:

• No malignancies were detected.
• Biliary epithelial atypia was significantly higher in patients with prior ES (32% vs. 8%).
• Previous ES, not time interval, was linked to atypia; p53 positivity was low.

Conclusions:

• ES induces biliary epithelial atypia, likely reactive/proliferative, not premalignant.
• The clinical significance of p53 immunoreactivity in biliary atypia warrants further study.
• ES is a significant factor for biliary epithelial atypia.