Does incidental mastoid opacification on computerized tomography necessitate referral to ENT?

Area of Science:

• Radiology
• Otolaryngology
• Medical Imaging

Background:

• Incidental temporal bone findings on MRI are common, but data on CT prevalence is limited.
• Asymptomatic otological disease discovered on CT scans often leads to uncertainty regarding appropriate clinical follow-up.

Purpose of the Study:

• To determine the prevalence of incidental otological disease on CT scans in asymptomatic adults.
• To evaluate the appropriateness of ear, nose, and throat (ENT) referrals for these incidental findings.

Main Methods:

• Retrospective observational study analyzing 468 adult head CT scans.
• Scans were reviewed for mastoid and/or middle ear opacification, excluding pediatric cases and those with prior otological indications.

Main Results:

• Opacification was present in 13% of scans (62 patients).
• After excluding those with prior intervention, the rate of incidental temporal bone disease was 11%.
• These incidental findings did not necessitate further intervention or ENT referral in most cases.

Conclusions:

• Incidental temporal bone disease on CT in asymptomatic individuals often does not require referral.
• Clinical examination should be correlated with radiological findings to prevent unnecessary ENT referrals and misdiagnosis.