tokens: RESULTS : Consistent with the known features of nasal polyps , CD4+ ( T helper/inducer ) , CD8+ ( cytotoxic/suppressor ) , CD68+ ( macrophages ) , mast cells , eosinophils and neutrophils were all clearly detected by their relevant monoclonal antibodies or appropriate histochemical staining , but only mast cells tested positive for ER /PR labelling with their polyclonal and monoclonal antibodies .