When divided the nasal polyps into IL-17Ahigh and IL-17low subgroup, we found the mRNA levels of IL-17A, MUC5AC and act1 were significantly higher in IL-17Ahigh polyp tissues than those in IL-17Alow polyp tissues (p<0.05) (Fig S1 in File SI). This evidence concerns the gene MUC5AC and Nasal polyposis.