Computed Tomography Analysis of the Ethmoid Roof: A Region at Risk in Endoscopic Sinus Injury

Authors

  • Pra Urusopone Department of Radiology, Lerdsin General Hospital

DOI:

https://doi.org/10.46475/aseanjr.v19i2.28

Keywords:

Ethmoid roof, Keros type

Abstract

Objective: To determine the olfactory fossa depth according to the Keros classification and determine the incidence of asymmetry in height and configuration of the ethmoid roof.

Materials and Methods: Retrospective analysis of 75 coronal computed tomography studies of paranasal sinuses and facial bones were performed. Measurement of the depth of the lateral lamella, classification of the depth according to Keros type and determination of the asymmetries in the ethmoid roof depth and configuration were done.

Results: The mean height of the lateral lamella cribiform plate (LLCP) was 2.15+1.29 mm. The cases were classified as 87.33% Keros type1 and 12.67 % as Keros type 2. No Keros type 3 was found .There was asymmetry in the LLCP height of 33.33% of cases and a configuration asymmetry in 8% of the cases. No significant difference between the mean height and distribution of Keros type between gender and laterality were also found.

Conclusion: As regards the olfactory fossa depth, the Keros type 1 was most frequently found. Asymmetry in the depth and configuration were detected in 33.33 and 8% respectively. Risk of inadvertent intracranial entry through the lateral lamella among Thai may be lower than other studies with majority of cases classified as Keros type 2 or 3.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

Luong,Marple BF. Sinus surgery: indications and techniques. Cli Rev Allergy Immunol 2006;30:217-22.

Dessi P,Castro F,Trigia JM,Zanaret M, Cannoni M. Major complications of sinus surgery: a review of 1192 procedures. J Laryngol Otol 1994:108:212-5.

McMains KC.Safety in endoscopic sinus surgery. Curr Opin Otolaryngol Head Neck Surg 2008;16:247-51.

Ulualp SO.Complications of endoscopic sinus surgery : appropriate management of complications: Curr Opin Otolaryngol Head Neck Surg 2008;16:252-9.

Stammberger HR, Kennedy DW. Paranasal sinuses: anatomic terminology and nomenclature. The Anatomic Terminology Group. Ann Otol Rhinol Laryngol Suppl 1995;167:7-16.

Kainz J Stammberger H. The roof of the anterior ethmoid:a locus minoris resistentiae in the skull base.Larngol Rhinol Otol(Stuttg).1988;67:142-9.

Ohnishi T, Tachibana T,Kaneko Y,Esaki S. Higgh risk areas in endoscopic sinus surgery and prevention of complications Laryngoscope 1993;103:181-5.

Basak S, Karaman CZ, Akdilli A, et al. Evaluation of some important anatomical variations and dangerous areas of the paranasal sinuses by CT for safer endonasal surgery. Rhinology.1998;36:162-7.

Rei M, Rei G. Height of Right and Left ethmoid roofs: Aspects of Laterality in 644 Patients. Int J Otolayngol 2011;508907

Paber J et al. Radiologic Analysis of the Ehmoid Roof based on KEROS classification among Filipinos. Philippine Journal of Otolryngology-Head and neck Surgery. 2008;23:15-9.

Solza S. et al. Computed tomography assessment of the ethmoid roof:a relevant region at risk in endoscopic sinus surgery. Radiol.Bros.2008;41(3):143-7.

Kaplinoglu H.et al.An analysis of the Anatomic Variations of the Paranasal sinuses and Ethmoid Roof Using Computed Tomography. Eurasian j Med.2013;45:115-25.

Downloads

Published

2019-03-11

How to Cite

1.
Urusopone P. Computed Tomography Analysis of the Ethmoid Roof: A Region at Risk in Endoscopic Sinus Injury. ASEAN J Radiol [Internet]. 2019 Mar. 11 [cited 2024 Mar. 29];19(2):108-15. Available from: https://asean-journal-radiology.org/index.php/ajr/article/view/28

Issue

Section

Original Article

Similar Articles

1 2 3 > >> 

You may also start an advanced similarity search for this article.