To determine NCL expression in leukemia, we obtained gene microarray data from three GEO (Gene Expression Omnibus) databases, GPL201 (CML, n = 10; normal, n = 7) (GSE5550) [29], GPL8300 (AML, n = 54; normal, n = 4) (GSE2191) [30], GPL96 (AML, n = 26; normal, n = 20) (GSE9476) [31], in which the gene expression was assessed using Affymetrix U133Plus2.0 GeneChips and analyzed by GraphPad Prism 5.04. This evidence concerns the gene NUCLEOLIN and leukemia.