Figure 2From: Epithelium and stroma from nasal polyp mucosa exhibits inverse expression of TGF-β1 as compared with healthy nasal mucosaAssessment of TGF-b1 percentage in the epithelium. A) Histological section (400× magnification) showing stroma and epithelium (TGF-β1 expression shown in brown). B) Stroma excluded and epithelium preserved. C) Positive TGF-β1 expression in epithelium after exclusion of the non-positive area.Back to article page