Retropharyngeal abscess occurs predominantly in children under 4 years because:

• A The posterior pharyngeal wall mucosa is thinner in young children
• B Children under 4 years have incomplete buccopharyngeal fascia, allowing easier spread
• C The retropharyngeal lymph nodes (nodes of Rouvière) drain the nasopharynx and are prominent in young children, involuting by age 3-5 years ✓
• D Adenoid hypertrophy in this age group physically compresses and infects the retropharyngeal tissue

Explanation

Retropharyngeal abscess in children under 4 years arises from suppuration of the retropharyngeal lymph nodes (nodes of Rouvière), which drain the posterior nasal passages, nasopharynx, adenoids, and paranasal sinuses. These nodes are well developed in infants and young children and naturally atrophy by ages 3-5, explaining why retropharyngeal abscesses are rare in older children and adults (who develop them from trauma or direct spread). Lateral neck X-ray shows widening of the retropharyngeal soft tissue (>7 mm at C2 or >14 mm at C6 in children as a rule of thumb). Emergency airway management and IV antibiotics with surgical drainage are required.

Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.