Impact of screening colonoscopy on outcomes in colon cancer surgery

Area of Science:

• Gastroenterology
• Surgical Oncology
• Preventive Medicine

Background:

• Screening colonoscopy is associated with reduced colorectal cancer incidence in the US.
• Early detection of asymptomatic colon cancer via screening may improve survival rates.

Purpose of the Study:

• To evaluate the impact of screening colonoscopy on colon cancer surgery outcomes.
• To compare staging, recurrence, disease-free interval, and survival between screened and unscreened patients.
• To determine if screening improves outcomes independently of tumor stage.

Main Methods:

• Retrospective review of a prospectively maintained database.
• Analysis of 1071 patients undergoing colon cancer surgery at a tertiary care center.
• Comparison of outcomes for 217 patients diagnosed via screening versus those diagnosed otherwise.

Main Results:

• Patients diagnosed through screening had less advanced tumors (lower T-stage, less nodal/metastatic involvement).
• Screened patients exhibited lower death and recurrence rates, with longer survival and disease-free intervals.
• Screening diagnosis remained a significant predictor of better outcomes, even after controlling for stage.

Conclusions:

• Colon cancer patients identified via screening colonoscopy present with lower-stage disease and achieve superior outcomes.
• Adherence to screening colonoscopy guidelines is crucial for early cancer detection, enhancing longevity and quality of life.
• Early detection through screening can reduce healthcare costs by preventing advanced disease.