Indian Journal of Radiology Indian Journal of Radiology  

   Login   | Users online: 1566

Home Bookmark this page Print this page Email this page Small font sizeDefault font size Increase font size     

 

NEURORADIOLOGY & HEAD AND NECK IMAGING Table of Contents   
Year : 2018  |  Volume : 28  |  Issue : 4  |  Page : 395-400
Olfactory fossa depth: CT analysis of 1200 patients


Department of Radiodiagnosis, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India

Correspondence Address:
Dr. Mattavana Ramakrishna Pillai Balachandran Nair
Department of Radiodiagnosis, Jubilee Mission Medical College and Research Institute, East Fort, Jubilee Mission P.O, Thrissur, Kerala
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijri.IJRI_119_18

Rights and Permissions

Background: Olfactory fossa (OF) is a depression in anterior cranial cavity whose floor is formed by cribriform plate of ethmoid. Lateral lamella, which forms its lateral boundary, is a thin plate of bone and is at risk of injury during functional endoscopic sinus surgery, especially when fossa is deep/asymmetric. Aims: To measure the variations in the depth of OF and categorize Kerala population as per Keros classification using computed tomography (CT). Settings and Design: This study was conducted in our institution from January 2016 to August 2017. Patients >16 years of age undergoing CT scan of paranasal sinuses (PNS) were included. Materials and Methods: Coronal PNS CT scan studies of 1200 patients were reviewed. The depth of OF was measured from vertical height of lateral lamella. Statistical Methods: Results were analyzed according to gender and laterality using independent sample t-test and Chi-square test. Results: The mean depth of OF was 5.26 ± 1.69 mm. Statistically significant difference was seen in the mean depth of OF between males and females but not between right and left sides. Keros type I was found on 420 sides (17.5%), type II in 1790 (74.6%), and type III on 190 sides (7.9%). Type III Keros was more on the right (9%) than left (6.8%) side, more in males (9.5%) than females (5.9%), and more among males on the right side (11.4%). Asymmetry in OF depth between two sides was seen in 75% of subjects. Conclusion: Prevalence of the dangerous type III OF, even though low, is significant especially among males and on the right side. Therefore, preoperative assessment of OF depth must be done to reduce iatrogenic complications.


[FULL TEXT] [PDF]*
Print this article     Email this article

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
  Citation Manager
 Access Statistics
  Reader Comments
  Email Alert *
  Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed1404    
    Printed80    
    Emailed0    
    PDF Downloaded203    
    Comments [Add]    

Recommend this journal