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Sinus means 'cavity', many structures of the human body are thus called sinuses. However, the term generally refers to the paranasal sinus.

Paranasal Sinus

The sinuses (paranasal sinuses) are air cavities within the facial bones. They are lined by mucous membranes similar to those in other parts of the airways . The Paranasal sinuses consist of the following :

  • Ethmoid Sinus
  • Frontal Sinus
  • Maxillary Sinus
  • Sphenoid Sinus

    An inflammation of the sinuses is called Sinusitis .



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    Last modified: Fri Jun 28 2002