Predicting Outcome in Colonoscopic High-risk Surveillance

Area of Science:

• Gastroenterology
• Oncology
• Genetics

Background:

• Effective colorectal cancer (CRC) surveillance requires precise risk stratification and timing for individuals in high-risk groups.
• Familial risk significantly influences CRC development, necessitating targeted screening strategies.

Purpose of the Study:

• To stratify the risk of neoplasia detection during colonoscopy in a cohort with increased familial CRC risk.
• To identify key family history variables associated with advanced colorectal lesions.

Main Methods:

• A cohort of 1,203 individuals with at least a two-fold increased CRC risk based on family history underwent regular colonoscopies.
• Logistic regression analysis assessed the impact of family history variables on adenoma and advanced adenoma prevalence.
• The association between initial colonoscopy findings and the risk of future lesions was evaluated.

Main Results:

• Advanced lesions prevalence correlated with the number of first-degree relatives with CRC and a younger age of diagnosis in the youngest affected family member.
• Family history showed a limited impact on the prevalence of simple adenomas.
• The risk of future advanced lesions was primarily linked to the presence of advanced lesions found during the initial screening colonoscopy.

Conclusions:

• Risk factors for adenomas and advanced colorectal lesions differ.
• The number of first-degree relatives with CRC and a young age of onset in a family member are significant predictors for advanced lesions, including cancer.
• Initial findings of simple adenomas or hyperplastic polyps did not predict subsequent advanced lesions.