text: <unk>  is inflammation of the vessel wall which is usually due to a<unk>  reaction to a known drug, auto-antigens or infectious agents such as bacteria.
option_0: Hypersensitivity vasculitis
option_1: Livedoid vasculitis
option_2: ANCA associated vasculitis
option_3: Polyarteritis nodosa pathophysiology
option_4: Polyarteritis nodosa
option_5: Microscopic polyangiitis pathophysiology
option_6: Golfer's vasculitis
option_7: Cutaneous small vessel vasculitis