“…Infliximab (IFX), adalimumab, certolizumab pegol and golimumab are the current four anti-TNF-α agents used to treat UC patients [19,27,29]. IFX is an effective treatment for pediatric UC [3,7,19,23]. Anti-TNF-α drugs share the same culoskeletal manifestation in the form of mild arthralgia or severe spondyloarthropathies especially in children positive for HLA-B27 had been also reported [2].…”