Anti-nuclear antibody (ANA), ANA-profile, autoimmune vasculitis profile (c-ANCA, p-ANCA), neurovirus panel (i.e., polymerase chain reaction for adenovirus, Epstein-Barr virus, herpes simplex viruses 1 and 2, human herpesviruses 6 and 7, cytomegalovirus, enteroviruses, varicella-zoster virus, Japanese encephalitis, and dengue virus), CSF-polymerase chain reaction for <i>Mycobacterium tuberculosis</i>, angiotensin-converting enzyme, anti-phospholipid, and anti-thyroid antibodies were negative. The gene discussed is ACE; the disease is autoimmune vasculitis.