On analysis of gene expression data available through OncomineTM (Compendia Bioscience, Ann Arbor, MI), we observed that LSD1 is over-expressed in bladder cancer, leukemia and colon adenocarcinomas as compared to their normal counterparts (Figure 1A), suggesting that overexpression of LSD1 may play a role in tumorigenesis. This evidence concerns the gene KDM1A and leukemia.