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Three years ago, 61-year-old Sharon Tschider from Bismarck, North Dakota, noticed she had bleeding with her bowel movements. Married and the mother of seven children, at first she thought the bleeding was coming from hemorrhoids resulting from her many pregnancies. But after the bleeding continued for two months, she went to her gastroenterologist. He performed a colonoscopy, an exam using a scope that views the entire colon, and found a rectal cancer.