Two new tests i.e. CT colonography, an X-ray test also known as virtual colonoscopy, and a stool DNA test, have been rejected by U.S. Preventive Services Task Force on grounds of need for additional research. The government appointed panel of independent medical experts recommends those over 75-years with negative colon cancer tests should discontinue screening, on the basis of test research.

Research indicates the benefits of colon cancer detection and treatment decline after age seventy-five, while risks rise e.g. Colonoscopy complications like perforated colons, infections and reactions to sedatives.  However, doctors may ask those 75-years and older to undergo routine tests, if their medical history indicates a need.

On the other hand, the health body recommends those over fifty to get screened as follows:
•    Entire colon Colonoscopy every 10-years.
•    Lower colon Sigmoidoscopy every 5-years, plus stool blood test every three years.
•    Stool blood test every year.

This year nearly 50,000-Americans are expected to die of colon cancer, while annually there are approx. 655,000 colorectal cancer, also known as colon or large bowel cancer, worldwide.  However, over the last two decades, screening and early detection and cure of what is the third most common form of cancer, including pre-cancerous growths has helped lower the death rate.