To the Editor:
We thank Dr. Rothschild for his interest1 in our article2 on the incidence of arterial and venous thrombosis in antineutrophil cytoplasmic antibody–associated vasculitis (AAV). He raises the interesting issue of susceptibility to both arterial and venous thrombotic events, which is also characteristic of antiphospholipid syndrome. The question arises as to the possible role of antiphospholipid antibodies (aPL) in …