Which imaging modality is preferred to evaluate a suspected retropharyngeal or deep neck abscess that may require drainage?

Which imaging modality is preferred to evaluate a suspected retropharyngeal or deep neck abscess that may require drainage?

• A. Ultrasonography
• B. CT with IV contrast
• C. MRI
• D. Plain X-ray

Answer: (B)

Imaging for a suspected retropharyngeal or deep neck abscess should rapidly identify an abscess and guide drainage. CT with IV contrast provides fast, widely available, high-resolution images of all deep neck spaces and can show a fluid collection with rim enhancement that distinguishes an abscess from simple cellulitis. It also defines the extent of the infection and its relationships to the airway, vertebrae, and major vessels, which is crucial for planning drainage and determining the safest approach. Ultrasound has value for superficial neck abscesses but often misses lesions deep in the neck due to gas and overlying structures, making it unreliable for suspected retropharyngeal involvement. MRI offers excellent soft-tissue detail but is not as practical in the acute setting: longer scan times, potential need for sedation, and limited availability can delay urgent management. Plain X-ray is insensitive for deep neck infections and cannot reliably characterize the abscess or guide drainage.

Imaging for a suspected retropharyngeal or deep neck abscess should rapidly identify an abscess and guide drainage. CT with IV contrast provides fast, widely available, high-resolution images of all deep neck spaces and can show a fluid collection with rim enhancement that distinguishes an abscess from simple cellulitis. It also defines the extent of the infection and its relationships to the airway, vertebrae, and major vessels, which is crucial for planning drainage and determining the safest approach.

Ultrasound has value for superficial neck abscesses but often misses lesions deep in the neck due to gas and overlying structures, making it unreliable for suspected retropharyngeal involvement. MRI offers excellent soft-tissue detail but is not as practical in the acute setting: longer scan times, potential need for sedation, and limited availability can delay urgent management. Plain X-ray is insensitive for deep neck infections and cannot reliably characterize the abscess or guide drainage.