In this study we analyzed the expression of COX-1, COX-2, 5-LOX and \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\hbox {CysLT}_2$$\end{document}CysLT2 in both nasal polyps and bronchial mucosa from patients with AIA in comparison to ATA patients and non-asthmatic controls with nasal polyps (NPwA). This evidence concerns the gene PTGS1 and nasal cavity polyp.