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Normal paranasal sinuses (CT)
#1
Presentation

Headache.

Patient Data
AGE: 18 years
GENDER: Female

CT
[Image: IMG-0001-00016_big_gallery.jpeg]
Axial bone window

[Image: IMG-0002-00017_big_gallery.jpeg]
Coronal bone window

[Image: IMG-0003-00025_big_gallery.jpeg]
Sagittal bone window

Clear scanned both maxillary antra, ethmoidal complexes, frontal and sphenoid sinuses.

Patent both osteomeatal units and sphenoethmoidal recesses.

Intact bony boundaries of the examined sinuses.

Central position of the bony nasal septum.

Bilateral clear concha bullosa.

The paranasal sinuses usually consist of four paired air-filled spaces. They have several functions of which reducing the weight of the head is the most important. Other functions are air humidification and aiding in voice resonance. They are named for the facial bones in which they are located:

maxillary sinus
sphenoid sinus
ethmoid sinus
frontal sinus
Variant anatomy
The paranasal sinuses are subject to marked variation between individuals and between sides in the same individual, regarding size (aeration) and bony septations. Total paranasal sinus agenesis is very rare . Isolated frontal sinus agenesis, on the other hand, is common.

References
1. Korkmaz H, Korkmaz M. Total aplasia of the paranasal sinuses. Allergy Rhinol (Providence). 2013;4 (2): e105-9. Free text at pubmed - Pubmed citation
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