[Diagnosis of persistent rhinitis].

A total of 9923 patients with persistent rhinitis were characterized on the basis of their symptoms and in vitro data. The most bothersome symptom in these patients was nasal obstruction. "Post-nasal drip" proved to be untypical for allergic rhinitis. In all the diseases investigated, involvement of eosinophilic granulocytes and mast cells was found to vary. In addition to endoscopy and imaging procedures, the determination of selective in vivo and in vitro parameters represents an essential part of the diagnostic work-up of persistent rhinitis, which thus proves to be a domain of the allergological rhinologist.