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Tonsillitis I: Introduction01:30

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MRI Findings in Acute Tonsillar Infections.

J Heikkinen1, J Nurminen1, J Velhonoja2

  • 1From the Departments of Radiology (J. Heikkinen, J.N., T.H., M.N., K.M., J. Hirvonen).

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|December 17, 2021
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Summary
This summary is machine-generated.

Magnetic resonance (MR) imaging accurately identifies abscesses in tonsillar infections, revealing most are peritonsillar. This imaging technique clarifies the extent of infection, including deep neck space involvement, aiding in patient management.

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Area of Science:

  • Radiology
  • Infectious Diseases
  • Otolaryngology

Background:

  • Tonsillar infections can involve abscesses ranging from intratonsillar to deep neck spaces.
  • Previous literature lacks clarity on the prevalence and precise nature of these abscesses.
  • Magnetic resonance (MR) imaging offers high diagnostic accuracy for neck infections.

Purpose of the Study:

  • To characterize the spectrum of MR imaging findings in tonsillar infections.
  • To determine the prevalence and location of abscesses associated with tonsillar infections.
  • To assess the utility of MR imaging in identifying deep neck space extension.

Main Methods:

  • Retrospective cohort study of emergency neck MR imaging scans in patients with tonsillar infections.
  • Assessment of imaging findings for signs of infection and abscess location.
  • Comparison of imaging findings with clinical, surgical, and final diagnoses.

Main Results:

  • 132 patients with tonsillar infection were included; 83% had at least one abscess.
  • Most abscesses were peritonsillar; no intratonsillar abscesses were identified.
  • MR imaging demonstrated parapharyngeal (36%) and retropharyngeal (10%) extension; positive predictive values were 0.98 for abscesses and 0.86 for deep extension.

Conclusions:

  • Emergency neck MR imaging accurately delineates the extent and nature of abscess formation in tonsillar infections.
  • MR imaging is a valuable tool for characterizing complications of tonsillar infections.
  • Findings aid in understanding the spectrum of tonsillar abscesses and their potential for deep extension.