Anti-MCV - Anti-Mutated Citrullinated Vimentin; Anti-CPP2 - Anti-Cyclic Citrullinated Peptide; IBD - Inflammatory Bowel Disease; AA - Axial Arthropathy; PA - Peripheral Arthropathy; AS - Ankylosing Spondylitis; SI - Sacroiliitis; UC - Ulcerative Colitis; CD - Crohn's Disease; SpAs - Spondyloarthropathies. The gene discussed is VIM; the disease is Crohn disease.