DEAR MAYO CLINIC: What causes nasal polyps, and do they always require removal? If they are removed, is there a chance they might come back? ANSWER: Nasal polyps form in the nasal passages and sinuses as a result of chronic inflammation called chronic rhinosinusitis. When they are small, nasal polyps may not cause any symptoms […] More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.