Plain language summary (for Research Letters only): Antineutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis has many clinical manifestations and pulmonary complications such as pulmonary fibrosis. We hypothesized that patients with ANCA-associated vasculitis would have radiographic evidence of a wide range of pulmonary abnormalities on CT and that ANCA titer would be associated with these pulmonary abnormalities.