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Dr Swathi Dhulipala | Rheumatologist | Autoimmune, RA & Lupus on Instagram: "WTF is ANCA? You’re not alone if this lab result caused anxiety — ANCA testing is confusing even for clinicians when taken out of context. ANCA (anti-neutrophil cytoplasmic antibodies) is not a screening test and not a diagnosis. It’s a supportive lab rheumatologists use when symptoms raise concern for certain types of vasculitis. Here’s what those patterns actually mean in simple terms: 🔹 c-ANCA (PR3) More often assoc