Fifteen EMT genes (MMP3, ITGAV, KRT14, PLEK2, SNAI2, GSK3B, ITGB1, MAP1B, TCF3, VPSA13, SMAD2, MMP2, SPARC, WNT5A, and ITGA5) were differently expressed, mainly in SCLC. This evidence concerns the gene MMP2 and small cell lung carcinoma.