Abstract
Infection of the neck is a common clinical problem in all age groups, especially children and young adults. The clinical symptoms and signs are often suggestive of the diagnosis. Imaging studies including CT and MR imaging are frequently required to confirm the diagnosis but more importantly to localize the infectious process and search for and delineate an abscess cavity. Ultrasound has also been used in the evaluation of superficial neck infections, especially to determine fluid accumulation. Conventional films consisting of an anteroposterior and lateral view were the examination before the introduction of CT in 1972. Conventional films can still be used for a preliminary survey, especially of the retropharyngeal space when there is a question of a retropharyngeal phlegmon or abscess.
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