The invention describes methods of treating erosive polyarthritis comprising administering a TNFα antibody, or antigen-binding portion thereof. The invention also describes a method for testing the efficacy of a TNFα antibody, or antigen-binding portion thereof, for the treatment of erosive polyarthritis.本發明描述治療侵蝕型多發性關節炎之方法,其包含投與TNFα抗體或其抗原結合部分。本發明亦描述一種測試TNFα抗體或其抗原結合部分治療侵蝕型多發性關節炎之功效的方法。