Anti-neutrophil cytoplasmic antibodies (ANCA) is seen in: (A) Rheumatoid arthritis, (B) Diabetes mellitus, (C) Wegener’s Granulomatosis, (D) Churg-Strauss syndrome
Answer is C. PR3-ANCAs are also present in up to 95% of cases; they are a useful marker of disease activity and may participate in Wegener’s granulomatosis.