[Netizen]

http://jama.ama-assn.org/cgi/content/abstract/295/20/2357

http://health.usnews.com/health-news/family-health/cancer/articles/2009/06/15/colonoscopy-risks-increase-with-age-and-illness.html

[George from New England]

I also think I remember our GP telling us that there would be signs in the blood work associated with a physical exam that would indicate the need for a colonoscopy.

Any thoughts there?