Man's routine blood test catches deadly colon cancer with zero symptoms Ian Ferguson, 37, had no symptoms when he got standard bloodwork that led to his cancer diagnosis. Now, he is sharing his story to encourage others to get screened. NEW You can now listen to Fox News articles! A Miami man credits a routine blood test for saving his life. Ian Ferguson, 37, had no symptoms when he got standard blood work as part of a regular physical. When the test showed microscopic blood loss, his physician