Interrogating web-based, expression databases we found MICAL2 mRNA variably and almost ubiquitously expressed in normal tissues, including stomach, lung and kidney (UniGene: http://www.ncbi.nlm.nih.gov/UniGene/ESTProfileViewer.cgi?uglist=Hs.501928), with noticeable expression variations in several types of human cancer (IST Online: http://ist.medisapiens.com/#ENSG00000133816), together with several outliers, also in lung and gastric cancer (GC), indicating possible patient subpopulations within each cancer type. Here, MICAL2 is linked to gastric cancer.