To further validate the results of bioinformatics analysis, the gene expression levels of the 12 hub genes from PPI network (ALOX5AP, BCL2A1, BTK, CYBB, NCF2, HCK, HK3, CSF1R, PLEK, CD300A, ITGB2, and FPR1) in nasal polyps from CRSwNPs and nasal mucosa from healthy controls were determined by RT-qPCR. This evidence concerns the gene ITGB2 and nasal cavity polyp.