Problem to be solved: to provide an IL-23 related disease, particularly a method for treating inflammatory diseases such as psoriasis, psoriatic arthritis or axillary (spinal) spondylitis (AX SPA), including axa-spondylitis and x-spa which is not recognized by X-ray findings.A method comprising administering an anti-il-23a antibody to a patient；Administering said anti-il-23a antibody to the patient at a first dose；B) after 4 to 24 weeks after the initial dose was administeredFor example, four to twelve weeks laterFor example, six to twenty-four weeks laterFor example, six to twelve weeks laterAdministering said anti-il-23a antibody to the patient at a first maintenance dose；4 to 24 weeks after the first maintenance dose was administeredFor example, four to twelve weeks laterFor example, six to twenty-four weeks laterFor example, six to twelve weeks laterContaining at least one additional maintenance dose to the patient, includingThe method.No selection【課題】ＩＬ－２３関連疾患、特に炎症性疾患、例えば乾癬、乾癬性関節炎又は体軸性（脊髄）脊椎関節炎（ａｘ－ＳｐＡ）（強直性脊椎炎及びＸ線所見が認められないａｘ－ＳｐＡを含む）を処置するための方法の提供。【解決手段】抗ＩＬ－２３Ａ抗体を患者に投与する工程を含む方法であって、ａ）初回用量の前記の抗ＩＬ－２３Ａ抗体を患者に投与する工程；ｂ）前記の初回用量が投与された４～２４週間後、例えば４～１２週間後、例えば６～２４週間後、例えば６～１２週間後に、１回目の維持用量の前記の抗ＩＬ－２３Ａ抗体を患者に投与する工程；及びｃ）前記の１回目の維持用量が投与された４～２４週間後、例えば４～１２週間後、例えば６～２４週間後、例えば６～１２週間後に、少なくとも１回の追加の維持用量を患者に投与する工程を含む、該方法。【選択図】なし
