First Gene Linked to Common Form of Psoriasis Identified (image) Washington University School of Medicine Share Print E-Mail Caption Scientists led by Washington University School of Medicine in St. Louis have identified the first gene directly linked to the most common form of psoriasis. Rare mutations in the CARD14 gene, when activated by an environmental trigger, can lead to plaque psoriasis, which accounts for 80 percent of all cases of the condition. Credit National Psoriasis Foundation Usage Restrictions Credit to National Psoriasis Foundation Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.