More specifically, each has either been previously associated with cancer (DCC in the Online Mendelian Inheritance in Man (OMIM) [22]; FHIT and DCC in the Genome Association Database (GAD) [23]), or belongs to a gene family that has been previously associated with some form of cancer (the Kinase gene PRKG1, and the GABA receptor subunit gene GABRG3). This evidence concerns the gene GABRG3 and cancer.