QUICK REVISION NOTES ON PARANASAL SINUSES

📌 POINTS TO PONDER

🔹Air-filled bony cavities located in the face and skull adjacent to the nose.

🔹Derive their nomenclature from the bones that they pneumatize.

🔹Occur as “paired” structures
– Frontal sinuses
– Maxillary sinuses
– Ethmoid sinuses
– Sphenoid sinuses

🔹Each sinus is connected to the nose by a small opening called an ostium.

🔹The sinuses form in utero as small pockets the size of a pea. At birth they are mostly rudimentary.