Palpable Excitement
A 76 year-old man presents with a florid spreading violaceous rash over most of his body - Palpable Purpura - What is your differential diagnosis?
Tag ANCA-associated vasculitis
Polyangiitis – MPA, GPA, EGPA
Polyangiitis - MPA, GPA, EGPA: similar but different diseases; positive Antineutrophil cytopasmic antibiodies (ANCA); renal histology (focal necrotizing, pauci-immune glomerulonephritis)