"Overdiagnosis in Low-Dose Computed Tomography Screening for Lung Cancer"
JAMA IM
http://archinte.jamanetwork.com/article.aspx?articleid=1785197 
"Conclusions and Relevance  More than 18% of all lung cancers detected by LDCT in the NLST seem to be indolent, and overdiagnosis should be considered when describing the risks of LDCT screening for lung cancer."