TGFB1 and chronic rhinosinusitis with nasal polyps: TGF-β1 concentration in plasma was found to be higher in the CRSsNP group than in the control group, 104.400 ± 56.190 vs. 32.890 ± 21.830 pg/mL, p = 0.0006, and in CRSwNP was significantly higher compared to the control group, 59.020 ± 44.190 vs. 32.890 ± 21.830 pg/mL, p = 0.0214.