Anca on Rheumatology Digesthttps://rheumatologydigest.org/tags/anca/Recent content in Anca on Rheumatology DigestHugoen-usWed, 29 Jul 2026 15:00:00 +0530Drug- and Vaccine-Induced ANCA-Associated Vasculitishttps://rheumatologydigest.org/posts/drug-vaccine-induced-anca-vasculitis/Wed, 29 Jul 2026 15:00:00 +0530https://rheumatologydigest.org/posts/drug-vaccine-induced-anca-vasculitis/A 2026 overview of drug- and vaccine-induced ANCA-associated vasculitis — clinically near-indistinguishable from idiopathic AAV, but with a recognisable serological fingerprint (dual MPO/PR3 positivity, elastase-ANCA, high IgM MPO-ANCA, low C4, neutropenia), a milder course, and one intervention no immunosuppressant can substitute for: stopping the drug. Antithyroid drugs, hydralazine and levamisole-adulterated cocaine dominate practice.