Pneumosinus dilatans

Pneumosinus dilatans is a term given to an enlarged aerated paranasal sinus (hyperpneumatisation) without thinning of its bony walls. The latter allows differentiation from a pneumocele.

It was initially described in the frontal sinuses but may involve any of the paranasal sinuses. It may cause pneumocephalus either by rupturing or because of a defect.

The presence of pneumosinus dilatans may be associated with an anterior skull base meningioma 3.

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Article information

rID: 24599
System: Head & Neck
Tag: cases
Synonyms or Alternate Spellings:
  • Sinus hyperpneumatisation
  • Sinus hyperpneumatization

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Cases and figures

  • Case 1: right frontal sinus
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