Cholecystectomy Is a Risk Factor for Proximal Colon Cancer That May Also Relate to its Aggressiveness

Area of Science:

• Gastroenterology
• Surgical Oncology
• Cancer Epidemiology

Background:

• Mixed conclusions exist regarding cholecystectomy as a risk factor for proximal colorectal cancer (CRC).
• Understanding this association is crucial for patient risk stratification and management.

Purpose of the Study:

• To investigate the association between cholecystectomy and the risk of developing proximal CRC.
• To analyze tumor characteristics and mutations in patients with CRC following cholecystectomy.

Main Methods:

• A multicenter retrospective cohort study reviewed 404 colorectal cancer (CRC) cases.
• Data included cholecystectomy history, tumor subsegment, histopathology (TNM staging), and KRAS, NRAS, BRAF mutations.
• Logistic regression analyzed the association between cholecystectomy and tumor location, adjusting for confounders.

Main Results:

• 52 patients had a history of cholecystectomy, with a median of 5 years prior to CRC diagnosis.
• Cholecystectomy was associated with an increased risk of proximal CRC (OR 2.86 crude, 2.42 adjusted).
• Proximal CRC cases post-cholecystectomy showed higher prevalence of advanced TNM stages (T3, T4b, N1b, M1a, M1c) and KRAS mutations (33%).

Conclusions:

• Cholecystectomy is linked to the development of proximal CRC across all subsegments.
• Tumors in these patients appear to be diagnosed at higher stages.
• Enhanced surveillance is recommended for patients with a history of cholecystectomy.