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What does the colonoscopy detect
that the sigmoidoscopy doesn’t? Basically, one wants to focus on advanced adenomas and
wants to look at proximal versus distal. What they found is that overall it was 4%
advanced proximal, 2% advanced distal. Right away you see something. The left colon
harbors advanced adenomas and cancers more commonly than the proximal colon. We don’t
know why that is but I’ve seen that in many studies. So sigmoidoscopy is clearly not
going to be half a mammogram because there’s more action on the left side than there is
on the right side. |