G-to-A RNA editing has been reported in the heterogeneous nuclear ribonucleoprotein K (HNRNPK) gene in colorectal cancer and the glutamate ionotropic receptor kainate type subunit 3, GRIK3) gene in the fetal human brain (Nutt et al., 1994, 7; Klimek-Tomczak et al., 2006). The gene discussed is GRIK3; the disease is colorectal cancer.