In two studies published today (30 January) in Nature Genetics, researchers from the Wellcome Trust Sanger Institute and their collaborators have identified a genetic variant that doubles an individual’s risk of developing ulcerative colitis, one of the subtypes of a chronic disorder known as Inflammatory Bowel Disease (IBD). (Links to the papers: de Lange KM et al. DOI 10.1038/ng.3760 and Luo Y et al. DOI 10.1038/ng.3761)