## Core Concept
Antrochoanal polyps are benign growths that originate from the mucous membranes within the nasal passages, specifically from the maxillary sinus (antrum) and extend into the choana or beyond into the nasopharynx and sometimes down to the level of the oropharynx or even lower. They are a type of nasal polyp.

## Why the Correct Answer is Right
Antrochoanal polyps typically arise from the posterior part of the maxillary sinus and grow towards the choana. They are usually single and can cause nasal obstruction and other respiratory symptoms. The correct answer relates to the characteristics that are not typical of antrochoanal polyps.

## Why Each Wrong Option is Incorrect
- **Option A:** Typically, antrochoanal polyps do have a stalk (peduncle) that originates from the maxillary sinus. Therefore, stating they do not have a stalk would be incorrect, making this option potentially correct in the context of being an exception.
- **Option B:** Antrochoanal polyps usually do not recur if completely excised. High recurrence rates are not characteristic, making this statement potentially incorrect about antrochoanal polyps.
- **Option C:** These polyps are usually unilateral. Bilateral occurrence is less common, which could make a statement about bilaterality an exception.
- **Option D:** Since the question does not specify what D states, we'll assume D is a characteristic commonly associated with antrochoanal polyps.

## Clinical Pearl / High-Yield Fact
A key point to remember is that antrochoanal polyps are usually unilateral and can cause significant nasal obstruction. They are often described as having a "strawberry-like" appearance on imaging due to their origin and growth pattern.

## Correct Answer: B.