CT colonography: performance and program outcome measures in an older screening population

Area of Science:

• Medical Imaging
• Gastroenterology
• Oncology

Background:

• Colorectal cancer (CRC) screening is crucial for early detection and prevention.
• CT colonography (CTC) is an established screening tool, but its performance in older populations requires evaluation.
• Older adults (65-79 years) represent a significant demographic for CRC screening programs.

Purpose of the Study:

• To assess the performance and program outcomes of CTC in individuals aged 65-79 within a large-scale CRC screening program.
• To determine the prevalence of advanced neoplasia and extracolonic findings in this older cohort.
• To evaluate the safety and efficacy of CTC as a screening modality for older adults.

Main Methods:

• Retrospective analysis of 577 patients aged 65-79 from a CRC screening program.
• Data collection included CTC performance, advanced neoplasia prevalence, colonoscopy referral rates, extracolonic findings, and complication rates.
• Statistical comparisons were made between the older cohort and the general screening population.

Main Results:

• The overall referral rate to optical colonoscopy was 15.3%, identifying 103 nondiminutive adenomas and 5 unsuspected cancers.
• Advanced neoplasia prevalence was 7.6%, with identified lesions being typically large (mean size 21 mm).
• Potentially important extracolonic findings occurred in 15.4% of patients, with no major complications reported.

Conclusions:

• CT colonography demonstrates safety and effectiveness as a screening tool for the older population (65-79 years).
• The study supports the use of CTC for CRC screening in older adults, highlighting its ability to detect significant pathology.
• CTC facilitates the identification of both colorectal and extracolonic abnormalities in this age group.