**Core Concept**
Retropharyngeal abscess is a severe complication of pharyngitis or other infections in the head and neck region. It occurs due to the collection of pus in the retropharyngeal space, which is a potential space between the buccopharyngeal fascia and the prevertebral fascia. This condition often affects children and can cause significant morbidity and mortality if left untreated.

**Why the Correct Answer is Right**
The correct answer will be a false statement about retropharyngeal abscess. This requires an understanding of the pathophysiology and clinical presentation of the condition. Retropharyngeal abscess typically presents with symptoms such as neck stiffness, difficulty swallowing, fever, and neck pain. It can also cause respiratory distress, especially if the abscess compresses the airway. The condition often requires prompt surgical drainage and antibiotic therapy.

**Why Each Wrong Option is Incorrect**
**Option A:** Retropharyngeal abscess is a common complication of adenoiditis. This is incorrect because retropharyngeal abscess is more commonly associated with infections of the upper respiratory tract, such as pharyngitis or tonsillitis.

**Option B:** The retropharyngeal space is a potential space that can be compressed by the prevertebral muscles. This is incorrect because the retropharyngeal space is actually a potential space between the buccopharyngeal fascia and the prevertebral fascia, not the muscles.

**Option C:** Retropharyngeal abscess is a rare condition that typically affects adults. This is incorrect because retropharyngeal abscess is actually more common in children, especially those under the age of 10.

**Option D:** The treatment of retropharyngeal abscess involves only antibiotic therapy. This is incorrect because retropharyngeal abscess often requires surgical drainage in addition to antibiotic therapy to resolve the infection.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that retropharyngeal abscess can cause significant airway compromise, so prompt recognition and treatment are crucial to prevent respiratory failure. This condition should always be considered in the differential diagnosis of a child with neck stiffness, difficulty swallowing, and fever.

**Correct Answer: D. The treatment of retropharyngeal abscess involves only antibiotic therapy.