Outline of guidelines for the management of vasculitis and vascular disorders in Japan, 2016 revised edition.

The proposal by the 1994 International Chapel Hill Consensus Conference on the Nomenclature of Systemic Vasculitides (CHCC1994) and by the CHCC2012 markedly influenced the classification and way of considering cutaneous vasculitis. In the proposal by the CHCC1994, hypersensitivity angiitis was defined as an equivalent pathological condition to microscopic polyangiitis or cutaneous leukocytoclastic angiitis (CLA), and it was not adopted as a disease name. However, CLA which was positioned as a type of small-vessel vasculitis is only a pathological name. In the proposal by the CHCC2012, a new category of single-organ vasculitis included CLA and cutaneous arteritis. Vasculitis allergica cutis (Ruiter) corresponded to CLA and cutaneous polyarteritis nodosa corresponded to cutaneous arteritis. The Japanese Dermatological Association (JDA) prepared guidelines for the management of vasculitis and vascular disorders in 2008 based on the proposal by the CHCC1994 and their original viewpoint of dermatology. The JDA subsequently revised the 2008 edition guidelines in 2016 following publication of the proposal of the CHCC2012 in Japanese. We presented the outline of the 2016 edition guidelines and propose a treatment algorithm for primary vasculitides based on the evaluation of the cutaneous symptoms for cases suspected as primary cutaneous vasculitides, which integrates the 2008 JDA guideline and CHCC2012 classification. This is the secondary English version of the original Japanese manuscript for the guideline for management of vasculitis and vascular disorders published in the Japanese Journal of Dermatology 127(3); 299-415, 2017.