This document summarizes the experience of using the monoclonal antibody rituximab to treat 11 patients with various forms of vasculitis at a single medical center in Italy. All patients had active organ involvement and were failing standard therapies. Patients received rituximab treatment and were found to have significantly reduced disease activity and organ involvement after 12 months as measured by the Birmingham Vasculitis Activity Score and Vasculitis Damage Index. This case series provides evidence that rituximab may be effective for treating refractory vasculitis when other treatments have failed.