Antineutrophil cytoplasmic antibody may suggest granulomatosis with polyangiitis, microscopic polyangiitis, eosinophilic granulomatosis with polyangiitis, or drug-induced vasculitis, but is not diagnostic. Electromyography. It is useful if a systemic vasculitis is suspected and neuromuscular symptoms are present. Arteriography. Arteriograms are helpful in vasculitis affecting the large and medium vessels but not helpful in small vessel vasculitis. Angiograms of mesenteric or renal arteries in polyarteritis nodosa may show aneurysms, occlusions, and vascular wall abnormalities. Arteriography are not diagnostic in itself if other accessible areas for biopsy are present. However, in Takayasus arteritis, where the aorta may be involved, it is unlikely a biopsy will be successful and angiography can be diagnostic. Tissue biopsy. This is the gold standard of diagnosis when it is taken from the most involved area. Treatment
Treatment is targeted to the underlying cause. However, most vasculitis in general are treated with steroids (e.g., methylprednisolone) because the underlying cause of the vasculitis is due to hyperactive immunological damage. Immunosuppressants such as cyclophosphamide and azathioprine may also be given. A systematic review of antineutrophil cytoplasmic antibody-positive vasculitis identified best treatments depending on whether the goal is to induce remission or maintenance and depending on severity of the vasculitis. References


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Lupoid sycosis is a cutaneous condition that is characterized by a scarring form of deep folliculitis, typically affecting the beard area. See also
Sycosis barbae
List of cutaneous conditions


== References ==