The diagnosis of ECRS has unique prognostic implications. Traditional features of the ECRS phenotype are not necessarily reliable markers for the presence of tissue eosinophilia. Serum eosinophilia may be a good surrogate marker of tissue eosinophilia but of limited use. The routine use of structured histopathology reporting in CRS is suggested, to allow for the diagnosis of ECRS and to identify other prognostic markers.
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Snidvongs et al. (2012) studied this question.
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