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[The CT scan of the agger cell and its adjacent structure in endoscopic paranasal sinus surgery]
1Department of Otorhinolaryngology, China-Japan Friendship Hospital, Beijing 100029.
Objective:
To promote the development of endoscopic frontal sinus surgery and naso-lacrimal anastomosis surgery by studying the agger cells and their adjacent structures.
Methods:
One hundred patients were observed by the continuous coronal CT scan and sagittal CT scan of the paranasal sinuses. Among them, 30 had deviation of nasal septum; 40 had chronic nasosinusitis. There were 80 adult and 20 children.
Results:
(1) The agger cells existed in 99% of the cases, the development of the agger cells in 9-16 years old children, and adult had no difference; (2) The morphology of agger cells differed widely, but its relationship to the anterior border of the middle nasal concha, bulla ethmoidalis and nasolacrimal canal was quite stable; (3) The upward pneumatization of the agger cells was not related to deviation of nasal septum, but closely related to the development of the frontal sinus; (4) The anterior nasosinusitis often influenced the agger cells and might result in hyperosteogeny.
Conclusion:
The agger cells situated at the pathway of the intranasal frontal sinus during surgery and dacryocystorhinostomy, the nasal CT scan might be beneficial to the prevention of surgical complications.