Moreover, contactin-5 (CNTN5), 26S proteasome non-ATPase regulatory subunit 14 (PSMD14), hepatic and glial cell adhesion molecule (HEPACAM) and hepatocellular Carcinoma, Down-Regulated 1 (HEPN1) are four genes associated with suicidality [1]. This evidence concerns the gene CNTN5 and carcinoma.