LOS ANGELES - Molecular messages and signals circulating in blood or contained in cells lining the airway can identify early stage cancer, according to research reported today at the 2007 Annual Meeting of the American Association for Cancer Research. Scientists looking to apply basic science knowledge to medical practice are developing tests that diagnose, predict or monitor cancer risks, without invasive tissue sampling. Such tests could benefit all, particularly underserved populations, such as the poor, who often wait until symptoms appear before seeing a doctor. >>> Discuss This Story