Title PageTitle:Cutaneous vasculitis with double negative ANCA and vessel wall biopsy：A Case ReportLi-Feng Chen1*, Yi-Qing Feng2*, Juan Ni11Department of Rheumatology and Immunology, General Hospital of the Central Theater Command,Wuhan430070, Hubei Province,P.R.C2 Department of Rheumatology and Immunology, General Hospital of the Central Theater Command,Hubei University of Medicine,Shiyan442000,Hubei Province,P.R.C(Co-First Author: Li-Feng Chen, Yi-Qing Feng; Co-corresponding authors: Juan Ni)Submitted for review and possible publication in