IGHE and eosinophilic granulomatosis with polyangiitis: Broncho-pulmonary allergic aspergillosis may mimic pulmonary involvement in EGPA: differential diagnosis is helped by finding Aspergillus spp at bronchoscopy lavage or dosing Aspergillus fumigatus specific serum IgE, which are pathognomonic of allergic aspergillosis (51).