A 4-year-old boy is brought to the emergency department with a 2-day history of high fever, muffled voice, and refusal to eat. His mother reports that he has been leaning his head back to breathe more easily and is drooling excessively. Past medical history is unremarkable. On physical examination, the child appears toxic and is sitting with his neck in slight extension. There is palpable anterior cervical lymphadenopathy and a visible bulge in the posterior pharyngeal wall. Lateral neck radiography shows a widened prevertebral space.
Which of the following is the most appropriate next step in the management of this patient?
The correct answer is:
D) Neck CT with intravenous contrast
The patient’s presentation is highly concerning for a retropharyngeal abscess. This is a deep neck space infection that typically occurs in children aged 2 to 4 years due to the suppuration of retropharyngeal lymph nodes, which regress by age 6. The classic presentation includes fever, odynophagia (refusal to eat), drooling, and a muffled ("hot potato") voice. A key physical finding is neck stiffness or pain with extension, often leading to the "turtleneck" posture to maintain airway patency. While lateral neck X-rays can show a widened prevertebral soft tissue space, CT with contrast is the gold standard for diagnosis. It is necessary to distinguish a true abscess, which requires surgical drainage, from retropharyngeal cellulitis and to assess the extent of the infection near vital structures like the carotid sheath.
Answer choice A: Incision and drainage in the ED, is incorrect. Unlike a peritonsillar abscess, which can often be drained in an awake adult in the emergency department, a retropharyngeal abscess is a surgical emergency that must be drained in the operating room under general anesthesia with a secured airway to prevent aspiration of pus.
Answer choice B: Dexamethasone and epinephrine, is incorrect. This is the treatment for croup (laryngotracheobronchitis). While both can present with respiratory distress and stridor-like sounds, croup typically presents with a barky cough and lacks the toxic appearance, drooling, and posterior pharyngeal bulge seen in retropharyngeal abscess.
Answer choice C: Intubation and mechanical ventilation, is incorrect. While airway management is the priority, blind intubation in the emergency department can be dangerous as it may rupture the abscess, leading to catastrophic aspiration. Airway stabilization should ideally occur in the controlled environment of the operating room.
Answer choice E: Throat culture and oral antibiotics, is incorrect. Retropharyngeal abscess is a life-threatening deep neck infection. Outpatient management is inappropriate; the patient requires admission, IV antibiotics (covering S.aureus, S.pyogenes, and anaerobes), and frequent airway monitoring.
Key Learning Point
Retropharyngeal abscess presents in young children with fever, drooling, muffled voice, and trismus or neck extension. Lateral X-ray shows widened prevertebral space, and diagnosis is confirmed by CT with contrast. The most feared complication is airway obstruction or spread to the "danger space," which can lead to mediastinitis.
