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sinus
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   Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.01 sec.

sinus

In biology, a sinus is a narrow cavity in the body. The paranasal sinuses in the skull communicate with the nose. Bacterial infection of these sinuses results in pain and inflammation and requires treatment with an antibiotic. Other examples of sinuses include the cavities in the membrane covering the brain through which the blood circulates.



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? Mentioned in ? References in periodicals archive
 
The abscess was drained and cranialization of the frontal and ethmoid sinuses was done (Fig.
Since the ethmoid sinuses are near the tear ducts in the corner of the eyes, inflammation of these cavities often causes swelling of the eyelids and tissues around your eyes, and pain between your eyes.
Computed tomography (CT) in both axial and coronal planes identified an expansile soft-tissue-density mass that was confined to the left sphenoid and ethmoid sinuses with foci of calcification that had displaced the globe anterolaterally secondary to the extension of the mass through the medial wall of the orbit (figure 1).
 
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