[Mast cell and its relation to eosinophilic inflammation in CRSsNP]

To observe the pathologic characteristics, and investigate mast cell and its activation in chronic rhinosinusitis without nasal polyps (CRSsNP) and their relations with eosinophilic inflammation.

HE stain was used to observe tissue features and count total inflammatory cells, mononuclear cells, plasma cells and eosinophilic in lamina propria of CRSsNP and inferior turbinate. Toluidine blue stain and immunohistochemical stain for tryptase were used to detect mast cell and its activation respectively in CRSsNP and control, and their corelations with tissue eosinophilia were analysed.

CRSsNP has increased total inflammatory cells, mononuclear cells and plasma cells but comparable eosinophilic and lamina propria glands compared with inferior turbinate. Mast cells corelated with activated mast cells, but there was no difference between CRSsNP and control for both of them and there were no corelation between mast cell and its activation with tissue eosinophilia.

CRSsNP has more serious inflammation but no more mast cell and its activation and eosinophil compared with inferior turbinate, and there were no corelations between mast cell and its activation with eosinophil count which suggests that mast cell and eosinophilic inflammation mediated by it may not play an important role in the pathogenesis of CRSsNP.