This effort revealed different psoriasis-associated variants with stronger effect in PsC (i.e., loci encompassing HLA-C, TNFRSF9, and LCE3A) or with stronger and more specific effect in PsA (i.e., loci near IL23R and TNFAIP3). The gene discussed is HLA-C; the disease is pancreatic serous cystadenoma.