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Frontal Sinus
Respiratory System

Frontal Sinus

Sinus frontalis

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The paired frontal sinuses are located between the two frontal bone tables separated by a septum. These are rarely symmetrical and can be further divided into smaller communicating recesses.

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Key Features/Anatomical Relations

The frontal sinus aperture will drain into the anterior portion of the middle meatus either through the ethmoidal infundibulum or medial to the hiatus semilunaris.


The frontal sinuses contribute to adding resonance to the voice and decreasing the overall weight of the skull.

List of Clinical Correlates

- Sinusitis

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Frontal Sinus

ScienceDirect image

The frontal sinus is a set of paired cavities in the frontal bone that communicate with the nasal cavity.

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