Inflammation of the ileum in patients with B27-positive arthritis.
D001168:Arthritis / Q000150:complications*; D006680:HLA Antigens / Q000032:analysis*; D015796:HLA-B27 Antigen; D006801:Humans; D007079:Ileitis / Q000150:complications*
D006680:HLA Antigens; D015796:HLA-B27 Antigen