Overexpression of Inducible Nitric Oxide Synthase in Allergic and Nonallergic Nasal Polyp

Figure 1

Photomicrograph of normal nasal mucosa (a), allergic nasal polyp (b), and nonallergic nasal polyp (c) stained with H&E ×400: (a) show pseudostratified columnar epithelium (arrow) with goblet cells (arrowhead) and thin basement membrane (asterisk). The stroma formed of loose C.T. tissue with blood vessels (B.V.) and seromucinous glands (red arrow). Notice that the cellular component of the stroma is mainly fibrous. (b) show pseudostratified columnar epithelium (arrow) with few goblet cells (arrowhead) and thin basement membrane (asterisk). Notice the high fluid content of the stroma (red arrow) with inflammatory cell infiltration and mainly eosinophils. The inset is a higher magnification of the stroma showing high content of eosinophils (asterisk). (c) show pseudostratified columnar epithelium (arrow) with few goblet cells (arrowhead) and thickened basement membrane (asterisk). Notice increase in the fluid content of the stroma (red arrow) with inflammatory cell infiltration and the absence of seromucinous glands and blood vessels.

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(b)

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