Regarding ethmoidal polyp, which one of the following is true ?
**Core Concept**
Ethmoidal polyps are a type of nasal polyp that arises from the ethmoid sinuses, often associated with chronic inflammatory conditions such as chronic rhinosinusitis. They are characterized by their gelatinous appearance and are usually filled with eosinophils, neutrophils, and mast cells.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of ethmoidal polyps. These polyps are often associated with an overproduction of mucus, which is due to the increased expression of MUC5AC mucin. The underlying mechanism involves the activation of the nuclear factor kappa B (NF-κB) pathway, leading to the production of pro-inflammatory cytokines such as IL-5 and IL-13. These cytokines promote the growth and survival of eosinophils, mast cells, and other inflammatory cells, contributing to the formation and maintenance of ethmoidal polyps.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because ethmoidal polyps are not primarily caused by a viral infection.
**Option B:** This option is incorrect because while antibiotics may be used to treat secondary infections associated with ethmoidal polyps, they are not a primary treatment for the polyps themselves.
**Option C:** This option is incorrect because while surgical removal of ethmoidal polyps may be necessary in some cases, it is not the only treatment option and is not the correct answer to this question.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that ethmoidal polyps are often associated with an underlying inflammatory condition, and treatment should focus on addressing the underlying inflammation, rather than just removing the polyps.
**Correct Answer:** C.