Table 2. The following criteria are only to be applied in the case of histological evidence of small vessel vasculitis.

Clinical criteria	Obstructive airway disease	+3
	Nasal polyps / CRSwNP	+3
	Mononeuritis multiplex	+1
Laboratory and biopsy criteria	Blood eosinophilia of >1,000 cells/µL or 1 × 109/L (blood)	+5
	Extravascular, predominantly eosinophilic inflammation (biopsy)	+2
	cANCA + / anti-PR3 + (blood)	–3
	Hematuria	–1

A score of > 6 makes EGPA likely. CRSwNP = chronic rhinosinusitis with nasal polyps; cANCA = antineutrophil cytoplasmic antibody..