Th2 (CD4+) cells producing IL5 and/or IL4 wereonly present in CRSwNP [0,41; IQR: 0,16–1,18], and negligible in nasal mucosa from controls [0,005; IQR: 0,000–0,05], CRSsNP [0,0497; IQR: 0,0092–0,0858] and CF-NP [0,04; IQR: 0,009–0,085] subjects as shown in (Figure 1e). This evidence concerns the gene IL4 and chronic rhinosinusitis without nasal polyps.