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.

Share article

Article information

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

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Case 1: right frontal sinus
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.