#IgG4 Pearls Thanks for sharing Isolated ⬆️ serum #IgG4 level ✅ How high? 5x ULN ➡️ PPV 75% ✅Typical organ(s) involved? ❓Another explanation Dr Jone Stone #Rheumatology #EULAR2024 https://t.co/UVKmH57iVM https://t.co/uxHBl0I3cM