#ACR21 #ACR2021 Clinical Pearls 🚨 Thread Alert 1/n 💥AAV does not typically cause hard palate lesions➡️consider: Cocaine induced midline destructive lesion(HNE+)/Malignancy 💥Limited GPA can be ANCA negetive in 50% 💥 oral cavity examination is a must in Rheum https://t.co/RxkLiGdcJt