Radiological correlation between pneumatization of frontal sinus and height of fovea ethmoidalis.
ABSTRACT We need more data about the variations of skull base to minimize the complications of ethmoidectomy. The aim of this study was to analyze the relationship between the pneumatization of the frontal sinus and height of the fovea ethmoidalis.
Paranasal coronal computed tomography (CT) scans of 487 sides of 300 patients were evaluated. The presence of the frontal cell and pneumatization of the frontal sinus were studied with respect to the height of the fovea ethmoidalis.
We found a statistically significant correlation between the frontal cell and frontal sinus hyperpneumatization (p = 0.000). We determined that there was a deeper fovea ethmoidalis in the sides that have a frontal cell (p <or= 0.001) and in the sides that have hyperpneumatization of the frontal sinus (p = 0.000). We also observed flatter fovea ethmoidalis in the sides that have hypopneumatization of the frontal sinus (p <or= 0.001).
The presence of a frontal cell or hyperpneumatization of the frontal sinus on CT scan should alert the clinician that there may be a deep fovea ethmoidalis.
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ABSTRACT: The Keros classification scheme has been used to describe the ethmoid skull-base configuration; however, this scheme only partially addresses key anatomic issues in ethmoid skull-base injury avoidance during surgery. Coronal computed tomography (CT) scans were reviewed for 200 patients undergoing sinus evaluation at a tertiary care institution. Keros classification, maxillary sinus:ethmoid height ratio, and the skull-base height:orbital height ratio were recorded for each patient. The Pearson correlation coefficient was used to determine if a relationship existed between the 3 sets of measurements. In the Keros classification scheme, 42% of patients were in class I, 50% class II, and 8% class III. In maxillary sinus to ethmoid height ratio, 58% were 1:1, 37% were 2:1, and 5% were >2:1. In the skull-base height to total orbital height ratio, 65% were in class I, 18% class II, and 17% in class III. There was no correlation between the classification schemes. The importance of the Keros classification lies primarily in the avoidance of iatrogenic injury to the cribriform region and medial ethmoid roof. To avoid penetration of the ethmoidal roof, the ethmoid skull-base height must be separately examined in relation to the orbit and total vertical dimension of the sinuses.International Forum of Allergy and Rhinology 09/2011; 1(5):396-400. · 1.00 Impact Factor
- Radiologia Brasileira 06/2008; 41(3):V-VI.
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ABSTRACT: Sinus computed tomography (CT) interpretation is subject to individual variation. We propose a template-driven approach as a method to ensure CT interpretation that is complete and efficient. Recent years have seen the description of newly noted anatomic abnormalities in the paranasal sinuses that should be noted during sinus CT interpretation. There exists significant variation in the methodology by which sinus CT scans are interpreted and the findings are reported. We believe that it will benefit radiologists and otolaryngologists alike to use a simple, template-driven approach to describe the findings encountered on a sinus CT. In this study, we present one such approach.Current opinion in otolaryngology & head and neck surgery 02/2013; 21(1):69-73. · 1.39 Impact Factor