FILE - This May 25, 2004 file photo shows aspirin tablets. Aspirin, one of the world's oldest and cheapest drugs, has shown remarkable promise in treating colon cancer in people with ce

 

              FILE - This May 25, 2004 file photo shows aspirin tablets. Aspirin, one of the world
FILE - This May 25, 2004 file photo shows aspirin tablets. Aspirin, one of the world's oldest and cheapest drugs, has shown remarkable promise in treating colon cancer in people with certain genetic mutations that often play a role in the disease. The study appears in the Thursday, Oct. 25, 2012 New England Journal of Medicine. (AP Photo/Houston Chronicle, Dave Einsel)