Diseases of PNS
Which sinus is NOT a part of paranasal sinus? [LQ]
Paranasal sinuses are air containing cavities in certain bones of skull. They are four on each side. Clinically, paranasal sinuses have been divided into two groups.
- Maxillary sinus
- Frontal sinus
- Anterior ethmoidal sinus
- Posterior ethmoidal sinus (opens in superior meatus)
- Sphenoid sinus (opens in sphenoethmoidal recess)
All of them open In the middle meatus.