Demographic and Clinicopathologic Factors Associated With Colorectal Adenoma Recurrence.

Area of Science:

• Gastroenterology
• Oncology
• Epidemiology

Background:

• Current colorectal cancer surveillance guidelines primarily focus on adenoma characteristics.
• These guidelines overlook significant temporal, racial, and sex-based variations in adenoma recurrence risk.
• This oversight limits the development of equitable and personalized patient care strategies.

Purpose of the Study:

• To investigate the associations between demographic factors, obesity, adenoma features, and colorectal adenoma recurrence risk over time.
• To analyze these associations within a large, longitudinal surveillance cohort.

Main Methods:

• Retrospective cohort study of adults undergoing initial colonoscopic polypectomy.
• Analysis included demographic variables (race, sex, obesity), family history, age at onset, and adenoma features (histology, size, number, dysplasia).
• Time-varying coefficient Cox models were used to assess recurrence-free survival across different follow-up periods ( <5, 5-10, >10 years).

Main Results:

• Obesity consistently increased recurrence risk across all surveillance intervals.
• Villous histology showed biphasic recurrence patterns, with early elevation and late reemergence.
• Female patients with high-risk adenomas had a significantly higher late-term recurrence risk compared to male patients.

Conclusions:

• Adenoma recurrence risk is influenced by both histopathologic features and demographic factors, exhibiting distinct time-dependent patterns.
• Current surveillance strategies need refinement to incorporate temporal variations and population-specific risk profiles for improved equity and personalization.