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inflammation of the membrane lining a sinus, esp a nasal sinus
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an inflammation of the paranasal sinuses in man and animals. In humans, acute sinusitis usually arises as a complication of influenza, acute respiratory diseases, or other infectious diseases; chronic sinusitis develops from acute sinusitis that has not been completely cured.

The general symptoms of acute sinusitis include elevated body temperature, headache, abundant nasal discharge, and difficulty in breathing through the nose, most often on one side. With chronic sinusitis, there is usually no increase in body temperature and the other symptoms are less pronounced. Localization of the process determines the symptoms. Sinusitis may be catarrhal or purulent, depending on the type of inflammation. With chronic sinusitis, proliferations of the mucosa (polyps) often form in the paranasal sinuses and the nasal cavity.

Several different forms of sinusitis are distinguished, depending on which sinus is affected. The most common form is maxillary sinusitis, which is an inflammation of the maxillary sinus. With frontal sinusitis, the frontal sinus becomes inflamed; with ethmoid sinusitis, the ethmoidal labyrinth; and with sphenoid sinusitis, the sphenoidal sinus. Sometimes the inflammatory process spreads to all the paranasal sinuses on one or both sides (pansinusitis). Treatment includes the use of medicinal agents, the administration of heat (hot-water bag, compress), and physical therapy. Sometimes surgical treatment is indicated. Prophylaxis includes the timely treatment of the cause of the disease. [23–1294–]

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Inflammation of a paranasal sinus.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
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When I feel a cold coming on - the precursor to that nasty aforementioned sinus infection - I do two things immediately: I start gargling with salt water, once every couple of hours or so, and I snort a saline solution, available over-the-counter under such monikers as Ocean Saline Nasal Spray.
By then she noticed another peculiarity: Although she could not stand long enough to wait for a light to change while crossing the street, she could manage if she kept moving, walking slowly in a circle.In April, her allergist diagnosed a bad sinus infection and doubled the medications she was taking to 10 per day, including a short course of prednisone, a corticosteroid sometimes used to treat severe sinus infections.
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Even after adjustment for antibiotic use, pneumonia and sinus infection in early life were significantly associated with an increased risk of asthma (OR, 2.2 and 2.0), Angela Schroeder and her coinvestigators reported in a poster presented at the annual meeting of the American Academy of Allergy, Asthma, and Immunology.
And so the entire sports world was stunned six months later when Sisler was unable to answer the call to spring training because of a sinus infection that followed a bout with influenza.