Nightly News   |  February 22, 2012

Colonoscopies save lives, researchers say

A study published in the New England Journal of Medicine demonstrated that removing precancerous polyps dramatically cuts the risk of dying from colon cancer. NBC’s Brian Williams reports.

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This content comes from Closed Captioning that was broadcast along with this program.

>>> there is news about a screening test millions had and few look forward to. tonight, a major study presents clear evidence of what doctors have been telling us for years, column on colosocpies do save lives. colon cancer is the second leading cause of cancer death in this country.