MSK: ANCA Associated Vasculitis: Free MSRA Podcast

🎧Deep Dive:ANCA-Associated Vasculitis (AAV) – Untangling Autoimmune InflammationTodaywe’re getting to grips with a tricky trio of autoimmune diseases affecting small vessels: Granulomatosis with Polyangiitis (GPA),Microscopic Polyangiitis (MPA), and Eosinophilic GPA (EGPA). Together, theyform the group known as ANCA-AssociatedVasculitis. 💉🩸We’ll take you from confusion to clarity on everything you need to revise this high-yield MSRA topic withconfidence. 🧠What is AAV?A group of primary small-vessel vasculitides, where theimmune system creates antineutrophil cytoplasmicantibodies (ANCAs) that trigger inflammation and damage to blood vessels— especially in the lungs, kidneys, sinuses,and more.Think:🔥 Autoimmune attack ➡️ Vesselinflammation ➡️ Multi-organ symptoms. 🧪Types ofANCA-Associated VasculitisGPA (Granulomatosis with Polyangiitis) – respiratory & renalMPA (Microscopic Polyangiitis) – kidneys, lungs, less ENTEGPA (Eosinophilic GPA) – asthma, eosinophilia, systemic 💡MSRA Mnemonic: “GEM”for GPA, EGPA, MPA🧬 All share ANCA links, but differ in clinicalflavour. 🔍Pathophysiology – TheShort VersionANCAs targetproteins in neutrophils → activation →they attack vessel walls → inflammation → tissue damage⚠️Small vessels = bigimpact (lungs, kidneys, ENT) ⚠️Symptoms to Know forMSRA:• 💤 Fatigue, weight loss, fever• 👃 Nasal crusting, sinusitis, epistaxis• 💨 Cough, SOB, hemoptysis• 🩸 Hematuria, proteinuria (renal)• 🦶 Arthralgia, rash (palpable purpura) 🧪Key Investigations• ANCA blood test (PR3 or MPO positive)• CRP, ESR, U&Es, FBC• Urinalysis – blood/protein• CXR or CT – pulmonary infiltrates• Tissue biopsy – definitive (granulomas,vasculitis)• Consider UBAC mnemonic:UrineBloodsANCAChest X-ray 💊Management Overview🧯Induction phase:• High-dose steroids (e.g. prednisolone)• Cyclophosphamide or rituximab🛡️Maintenance phase:• Azathioprine, methotrexate,or mycophenolate• Monitor CRP/ESR,renal function, ANCA titres• Prophylaxis: Pneumocystis pneumonia (PCP) withco-trimoxazole if high-dose steroids used 🚨Complications toWatch For• ⚠️ Renal failure• 💔 Pulmonary haemorrhage• 🧠 Stroke (if CNS vasculitis)• 🗣️ Subglottic stenosis in GPA• 🧫 Immunosuppression → Infection risk 📈Prognosis✅ With early recognition and aggressive treatment, outcomes have dramatically improved🔁 But relapses are common — lifelong follow-up often needed⏳ Still associated with increasedmorbidity/mortality compared to general population 🎯Rapid Recap for theMSRA:• Autoimmune + Small vessels + ANCA• Classic signs = ENT + lungs + kidneys• Diagnosis = ANCA +biopsy + imaging• Treatment =steroids + immunosuppression• Watch for relapse,infections, organ damage 📎Useful MSRA Links forANCA Vasculitis📝 Revision Notes:https://www.passthemsra.com/topic/anca-associated-vasculitis-revision-notes/🧠 Flashcards:https://www.passthemsra.com/topic/anca-associated-vasculitis-flashcards/📂 Accordion Q&A Notes:https://www.passthemsra.com/topic/anca-associated-vasculitis-accordion-qa-notes/🧪 Rapid Quiz:https://www.passthemsra.com/topic/anca-associated-vasculitis-rapid-quiz/🎯 Bonus Quiz: https://www.passthemsra.com/quizzes/anca-associated-vasculitis/🌐 Main Site: https://www.passthemsra.com🎁 Free Prep: https://www.freemrsra.com 💬Final ThoughtWhen symptoms spanENT, lungs, kidneys — think AAV.Spottingthe pattern early saves lives. 🔬🫁🩸Which organs wereinvolved first?Was it a rash, acough, or proteinuria that gave the game away?🧠 Stay sharp, and keep revising smart. #MSRA #MSRARevision#ANCA #AutoimmuneVasculitis #GPA #MPA #EGPA #PassTheMSRA #FreeMSRA #NephroMSRA#RheumMSRA #SmallVesselVasculitis