%0 Case Reports %T Tocilizumab effectively reduces flares of hyperimmunoglobulin D syndrome in children: Three cases in China. %A Li C %A Chen X %A Tang X %A Zeng H %A Zhou J %J Mol Genet Metab Rep %V 40 %N 0 %D 2024 Sep %M 38983106 %F 2.082 %R 10.1016/j.ymgmr.2024.101105 %X Hyperimmunoglobulin D syndrome (HIDS) is a rare but severe autoinflammatory disease with a poor prognosis if not diagnosed and treated early. Here, we report three cases of HIDS in children with typical clinical manifestations and a clear genetic diagnosis. Patient 1 experienced recurrent fever flares with a maculo-papular skin rash. Patient 2 presented with periodic fever, cholestasis, lymphadenopathy, aphthous stomatitis, arthralgia, and abdominal pain and underwent surgery for intestinal obstruction. Patient 3, a sibling of patient 2, presented with periodic fever and underwent a surgical procedure for intussusception. All three patients were administered interleukin (IL)-6 receptor antagonist (tocilizumab). The results showed that tocilizumab effectively reduced inflammatory flares. Early diagnosis and tocilizumab treatment are effective at improving the prognosis of HIDS patients.