1. Progress Report Rheumatology WG September 2015 Masayoshi Harigai, Jonathan Kay

2. Rheumatology WG members RolesNameAffiliations Chair (Co-chair)Jonathan KayUniv. of Massachusetts Medical School, USA Co-chairMasayoshi HarigaiTokyo Women’s Medical University Managing editorMari KiharaTokyo Medical & Dental Univ., Japan memberSang-Cheol BaeHanyang Univ. Medical Center, Korea member Sandra V. Navarra St. Luke’s Medical Center, Phillipines member Christy I. Sandborg Stanford Medical Center, USA member Dougados Maxime Hospital Cochin, Paris, France member Loreto Carmona Fundacion Española de Reumatologia, Spain member Anthony D. Woolf Royal Cornwall Hospital, UK member Yehuda Shoenfeld Sheba Medical Center, Israel memberPeter BrooksThe University of Queensland, Australia memberEloisa BonfaFaculdade Medicina, Brazil memberSeza ÖzenHacettepe University, Turkey

3. Progress report (1) New progress in 2015 Dr. Mari Kihara has been assigned as a new managing editor of Rheumatology WG to prepare for future work for the revision. Problems to be solved No new problems

4. Progress report (2) Classification hierarchy Vasculitis – GA50.12 Aortic arch syndrome  Takayasu arteritis Nomenclature of vasculitis was decided at the Chapel Hill Conference 2014 by the group of specialists and they decided to use Takayasu arteritis. – FL60 microscopic polyangiitis (Chapter 15) should primarily belong to Chapter 16. It affects not only skin but also many internal organs. – FB42 Tophaceous gout (Metabolic and nutritional disorders affecting the skin in Chapter 15) should primarily belong to Chapter 16. It is very important rheumatic disease in Western countries. – FB00 Behcet disease (Multisysytem autoinflammatory disorders in Chapter 15) should primarily belong to Chapter 16. It involves many internal organs.