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Investigations

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

Investigations in acute mastoiditis may reveal:

  • a raised white cell count, especially neutrophils
  • opacity and air coalescence seen on mastoid radiograph

Other possible features of acute mastoiditis that may be found are:

  • a subperiosteal abscess over the mastoid process
  • an abscess formed in the neck - Bezold's abscess
  • extension of infection to the zygoma, causing a zygomatic mastoiditis

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