Mesak et al. [1] detected XRRA1 expression in normal tissues/organs and cells, as well as in various cancer cell types (such as breast cancer, glioma, melanoma, lung cancer, and neuroblastoma) by RT-PCR and found that XRRA1 was present in all cell types, although the expression level was variable. The gene discussed is XRRA1; the disease is central nervous system cancer.