**Core Concept**
Antrochoanal polyps are benign, unilateral growths that arise from the mucous membranes of the maxillary antrum and extend into the nasopharynx through the choana. They are a common cause of nasal obstruction in children, and their management requires a multidisciplinary approach.

**Why the Correct Answer is Right**
The treatment of choice for antrochoanal polyps in children is endoscopic sinus surgery (ESS). This minimally invasive procedure allows for the complete removal of the polyp, preservation of surrounding structures, and restoration of normal sinus function. ESS is particularly advantageous in children due to its low morbidity and high success rate. The procedure typically involves the use of a nasal endoscope to visualize the sinuses and a microdebrider to remove the polyp.

**Why Each Wrong Option is Incorrect**
**Option A:** Antibiotics may be used as an adjunctive treatment to manage secondary infections, but they are not the primary treatment for antrochoanal polyps.
**Option B:** Nasal decongestants and saline irrigation can help alleviate symptoms, but they do not address the underlying cause of the polyp.
**Option C:** Polypectomy via Caldwell-Luc procedure is an older technique that may be associated with higher morbidity and is generally reserved for more complex cases.

**Clinical Pearl / High-Yield Fact**
Remember that antrochoanal polyps can be associated with cystic fibrosis, so a thorough evaluation for underlying conditions is essential in children with recurrent polyps.

**Correct Answer: C. Polypectomy via Caldwell-Luc procedure.