Which radiographic findings suggest acute sinusitis (sinus infection)?

Updated: Mar 01, 2018
  • Author: Itzhak Brook, MD, MSc; Chief Editor: Michael Stuart Bronze, MD  more...
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Radiographic findings in patients with acute sinusitis include diffuse opacification, mucosal thickening (>4 mm), or an air fluid level. These findings, in conjunction with clinical features of acute sinusitis, are helpful in confirming the diagnosis.

When plain film radiographs are compared with the criterion standard (CT scans), however, a 75-80% disagreement occurs. This means that plain film radiography reveals disease in 40% of cases in which no disease is demonstrated on CT scanning and that plain film radiographs appear normal in 35-40% of cases in which disease is found on CT scanning.

See the main article Imaging in Sinusitis for more information.

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