Posted by Kate Murphy on December 17th, 2008
The percentage of colorectal cancer deaths prevented by colonoscopy may be overestimated.
While still very effective in preventing colorectal cancer and deaths from the disease, limits of the test may be larger than previously thought. Patients need to know that having colonoscopy does not guarantee that they won’t get colorectal cancer.
Experts now say that screening colonoscopy may reduce death from colorectal cancer by 60 to 70 percent and may not keep patients from dying from cancers on the right side of their colons at all.
A new Canadian study found that some people who died of colorectal cancer had a colonoscopy in the years before their cancer diagnosis. A previous completed colonoscopy reduced chances of dying from colorectal cancer by two thirds in patients with cancers on the left side of their colons but did not decrease risk of death among those with right-sided cancers. Read the rest of this entry »