The AAFP concludes that the evidence is insufficient to recommend for or against screening asymptomatic persons for lung cancer with either low dose computerized tomography (LDCT), chest x-ray (CXR), sputum cytology, or a combination of these tests. (2004)
(Grade: I recommendation)
Grade Definition: http://www.uspreventiveservicestaskforce.org/uspstf/grades.htm#pre
Clinical Considerations: http://www.uspreventiveservicestaskforce.org/3rduspstf/lungcancer/lungcanrs.htm#clinical