Medicine General 62a95544 CANCA Positivity is specific for: A Polyaeritis Nodosa B Wegener's granulomatosis C Henoch shontein purpura D Churg strouss syndrome High-Yield Explanation Answer is B (Wegener's granulomatosis): CANCA refers to Cytoplasmic Antineutrophilic cytoplasmic antibodies and its presence is highly specific for Wegener's granulomatosis