Seven psychosis-implicated SNPs across five different genes (proxies of ZNF804A-rs1344706, CACNA1C-rs1006737, BDNF-rs6265, DISC1-rs2793092, DISC1-rs11122319, NRG1-rs6994992 and NRG1-rs35753505 itself) were examined in our independent sample for effects on brain volume. The gene discussed is CACNA1C; the disease is psychotic disorder.