| Morphologic Analysis of Crista Galli Using Computed Tomography |
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Jong Jun Kim, Jae Hyeong Cho, Jae Won Choi, Hyun Woo Lim, Yong Jin Song, Soo Jung Choi, Nam Kyung Yeo |
1Department of Otolaryngology, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea. newnew1@hanmail.net
2Department of Radiology, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea. |
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| Abstract |
OBJECTIVE: We often observe the variation of Crista galli (CG) which lies in the midline above the cribriform plate on computed tomography (CT) scans. We investigated the variations in CG and the factors which affect its pneumatization.
MATERIALS AND METHODS
We analyzed the CT images of 818 chronic rhinosinusitis patients between July 2003 and July 2011. We investigated height, position relative to the cribriform plate, degree of pneumatization, and cell origin for the pneumatization in CG. We analyzed the relationship between several factors (age, sex, and position of CG) and pneumatization of CG.
Results
The average height of CG was 17.98 mm. In 13.9% of subjects, the base of CG did not extend below the level of the cribriform plate. In 84.2%, CG extended less than 50% of its height below the cribriform plate. In 1.8%, CG extended more than 50% of its height below the cribriform plate. Pneumatization of CG was found in 12.2%. Except one, every pneumatization was connected with the frontal sinus. The rate of pneumatization was significantly different depending on age.
Conclusion
Our study demonstrated that CG showed various morphology and pneumatizaiton. The pneumatization of CG was mainly originated from frontal sinus and related to aging. |
| Key Words:
Crista galli;Computed tomography;Pneumatization;Ethmoid bone;Frontal sinus |
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