An insidious onset of Eosinophilic granulomatosis with polyangiitis

Eosinophilic granulomatosis with polyangiitis (EGPA) is a rare small-vessel vasculitis, often associated with MPO p-ANCA (myeloperoxidase–perinuclear–anti-neutrophil cytoplasmic antibody) positivity. It is often difficult to diagnose.