BTG3 and spondylitis: Spondyloarthritis patients presented, either singly or in combination, with sacroiliitis with spondylitis; polyarticular arthritis; persistent pain and tenderness in the tendo-Achillis or heel; or pauciarticular arthritis associated with recent history (three months previously) of dysentery, together with high (ESR > 40 mm/h) and negative autoimmune parameters (ANA, dsDNA, and ANCA).