CT colonography detects cancer in older age group

An earlier US-based study involving 2600 asymptomatic participants showed CTC could identify 90% of those with large colorectal adenomas and cancer, as would be detected with traditional colonoscopy.

A new analysis based on age, showed that CTC – considered an emerging screening tool – was as effective in people older than 65 years as it was in younger participants.

Dr Gregor Brown, head of endoscopy at the Alfred Hospital, Melbourne, said that while CTC was quicker and cheaper than colonoscopy, it was less likely to detect precancerous polyps.

“We know that part of the benefit of colonoscopy-based surveillance and screening is polypectomy, which prevents cancer and saves lives,” he said.

“Early detection of cancer alone is not enough.”

Radiology 2012, online 23 Feb