Antineutrophil cytoplasmic antibody (ANCA)-positive vasculitis is an uncommon complication of the use of propylthiouracil. When it occurs, it affects multiple organs as any systemic vasculitis. We report three females and one male, aged 30, 40, 43 and 41 years respectively, that after a lapse of 12 to 28 months of propylthiouracil use, presented clinical signs of vasculitis.
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