Canadian Medical Guide > Diseases > Respiratory Tract Diseases > Nose Diseases > Paranasal Sinus Diseases > Sinusitis Terms and Definitions

Sinusitis

Medical Definition:	An inflammatory process of the mucous membranes of the paranasal sinuses that occurs in three stages: acute, subacute, and chronic. Sinusitis results from any condition causing ostial obstruction or from pathophysiologic changes in the mucociliary transport mechanism.
Guide Notes:	IM; sinusitis of specific sinus is also available (e.g., ETHMOID SINUSITIS)

Sinusitis Categories.

	Ethmoid Sinusitis - Inflammation of the ethmoid sinus. It may present itself as an acute (associated with viral rhinitis) or chronic (associated with allergic or hyperplastic sinusitis) condition.
	Frontal Sinusitis - Inflammation of the frontal sinus; in most cases the infection is caused by the bacteria STREPTOCOCCUS PNEUMONIAE and HAEMOPHILUS INFLUENZAE. This condition may be acute or chronic.
	Maxillary Sinusitis - Inflammation of the maxillary sinus. In most cases it is the result of infection by the bacteria HAEMOPHILUS INFLUENZAE; STREPTOCOCCUS PNEUMONIAE; and STAPHYLOCOCCUS AUREUS. This condition may be acute or chronic.
	Sphenoid Sinusitis - Inflammation of the sphenoid sinus. This condition usually is accompanied by pansinusitis and may present itself in an acute or chronic form.

Sinusitis Medical Definitions and Terms

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