Accessory Ostia of the Maxillary Sinus Anterior to the Uncinate Process

If an ostium to the maxillary sinus can readily be seen by endoscopy in outpatients, it is probably an accessory ostia. The accessory ostium that is most readily seen lies anterior to the edge of the uncinate process (Fig. 6.26a-d). Such ostia are said to be the result of recurrent acute maxillary infections, but this is conjectural.

Uncinate Bone

Fig.6.26a-d Anterior accessory ostium and its appearance on CT.

Fig.6.26a-d Anterior accessory ostium and its appearance on CT.

Accessory Maxillary Sinus Ostium Scan
Fig. 6.27 a An endoscopic view of a right posterior accessory ostium and b its appearance on CT. Note the left posterior accessory ostium on CT.
Maxillary Sinus Ostium

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  • neftalem
    What is a maxillary accessory ostium?
    8 years ago
  • Lenora
    What are accessory ostia?
    8 years ago
  • jenni
    WHAT IS ACCESSORY MAXILLARY OSTIA?
    7 years ago
  • Hamish
    What is an accessory ostium into the maxillary sinus?
    7 years ago
  • Kristiina
    What is accesory ostia?
    4 years ago

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