LRRK2 and chronic rhinosinusitis without nasal polyps: The results demonstrated that the mRNA expression levels of LRRK2 in CRSsNP tissue were significantly and positively related to the expression of CD3 (r = 0.7286; p = 0.0029), Charot–Leyden crystal (CLC; r = 0.5712; p = 0.0284), CD68 (r = 0.146; p < 0.05), but not CXCR1, tryptase and CD68, which indicated that the expression of LRRK2 may derive from T cells, eosinophils (Fig. 3).