1st order laboratory parameters – obligatory laboratory tests.
- Blood count – eosinophilia [increase in the number of eosinophilic granulocytes, in blood and affected organs].
- Inflammatory parameters – CRP (C-reactive protein).
- Total IgE [↑]
- Alkaline phosphatase (AP) [possibly ↑]
- Autoimmune serology:
- PANCA (perinuclear antineutrophil cytoplasmic antibodies) (in only 40% of cases)Note: Histological confirmation of the diagnosis by biopsy of clinically affected organs should be sought.
- Myeloperoxidase specificity [often.]