NASAL POLYP DISEASE INTRODUCTION
Nasal polyps are grape-like structures growing out from the ethmoid sinuses into the nose. They appear in the middle meatus and superior meatus of the nose (Figure 55). Their origin is inflammatory, and they form by the progressive weighting of slightly-inflamed mucous membrane by excessive tissue fluid. This ultimately leads to the formation of a pale, smooth, oedematous polyp with a stalk leading back into the ethmoid air cell from which is arises.