Tag ANCA-associated vasculitis

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?
CCC Critical Care compendium 340

Polyangiitis – MPA, GPA, EGPA

Polyangiitis - MPA, GPA, EGPA: similar but different diseases; positive Antineutrophil cytopasmic antibiodies (ANCA); renal histology (focal necrotizing, pauci-immune glomerulonephritis)