![]() Previous literature on the diagnostic accuracy of CT has focused on deep neck infections, for which the positive predictive value (PPV) for abscesses is about 80%, 3 ⇓- 5 most likely due to the limited soft-tissue contrast of CT. While PTAs are not typically considered deep neck infections, they can become deeply extended abscesses if they rupture through the constrictor muscle to the deep neck spaces such as the parapharyngeal and retropharyngeal spaces.Įmergency neck imaging has traditionally been performed using contrast-enhanced CT. Peritonsillar abscesses (PTAs) are collections of pus in the pharyngeal mucosal space between the tonsillar capsule and the pharyngeal constrictor muscle. 2 The purpose of imaging is to differentiate abscesses from cellulitis and to describe the true extent of an abscess to select the appropriate treatment. 1 While common tonsillar infections can usually be treated on clinical grounds, emergency imaging may be required to identify abscess formation and rule out other diagnoses. Tonsillar infections are common, many are resolved conservatively, but complicated infections with abscesses still cause a substantial amount of morbidity and surgery. ABBREVIATIONS: CRP C-reactive protein Gd gadolinium ITA intratonsillar abscess LOS length of the hospital stay PPV positive predictive value PTA peritonsillar abscess SLS sublingual space SMS submandibular space T2SI T2-signal intensity VS visceral space ![]()
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