Methods: EPCs will be numerated by flow cytometry using CD133, CD146, CD34, CD45 and VEGFR2 antibodies. Primary cultures will be used to identify EPCs at 5-days culture by the same markers. In addition, for BPCO et NSCLC patients, Vascular endothelial cell growth factor (VEGF) concentration will be measured in peripheral sera by ELISA commercial test.