Amsterdam — Although recommendations for screening for colon cancer are
widespread, the method for screening is still under debate.
A study
published in Lancet Oncology suggests that for advanced cancer, computed
tomographic (CT) colonography has a diagnostic rate similar to traditional
colonoscopy. CT colonography is sometimes referred to as virtual colonoscopy.
Researchers in Amsterdam invited members of the general population for
colorectal cancer screening by colonoscopy or noncathartic CT colonography. Of
the 5,924 participants invited for colonoscopy, 1276 (22%) underwent the
procedure, compared with 982 (34%) of the 2920 CT colonography invitees,
according to an article
in Medscape.com that reported the findings.
The researchers report that the diagnostic yield for advanced neoplasia was
8.7 per 100 participants for the colonoscopy group and 6.1 per 100 participants
for the CT colonography group. For lesions 10 mm or greater, the diagnostic
yield for advanced neoplasia was similar for both techniques — 1.5 per 100
invitees for colonoscopy and 2.0 per 100 invitees for CT colonography —
indicating that both procedures can be used successfully for population-based
screening, according to the researchers.
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