Published by on February 19, 2020
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elaborated with the help of the Keros classification. classification was used for the measurement of the depth of the olfactory fossa as follows. To determine the Keros classification and asymmetrical distribution rates of the ethmoid roof and the frequency of anatomic variations of the paranasal sinuses. Acta Otolaryngol. Feb;(2) doi: / Epub Sep 9. Is the Keros classification alone enough to identify.

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The relevance of evaluating the ethmoid roof, both by means of endoscopy and CT, for preventing surgical complications has been approached by several studies in the medical literature 24,7,8,10,14,30, Cribriform plate lateral lamella depth values according to Keros classification.


Prospective study of CT scans. Computed tomography CT has contributed not only to the evaluation of sinonasal diseases, but also to the characterization of the paranasal sinuses anatomy In another study developed with children in the age range between 0 and 14 years, Anderhuber et al. Anatomical variations in the human classificatikn sinus region studied by CT. They reported a statistically significant height difference between the right and left sides in women and men. In their study on cases with chronic classiication, Azila et al.

Computed tomography images were analyzed using MX-View software, version 3.

Keros classification of olfactory fossa | Radiology Reference Article |

Both in the present study and in the one developed by Lebowitz, there was a prevalence of lateral angulation to the left. Table 2 shows that in In CT examination, the paranasal sinus is found in coronal cross-sections at the anterior region of the joint connecting the middle concha to the skull base. Bilateral maxillary sinus hypoplasia was not detected. Articles Cases Courses Quiz. Minor complications occur in 1.


Coronal CT images were selected, considering that the coronal plane is the best for evaluating the ethmoid roof anatomy, providing detailed information about this segment that usually presents many variations even between left and right sides in a same individual, and consequently minimizing risks in surgical interventions.

Ann Otol Rhinol Laryngol. An understanding of the anatomy, diseases, and variations of the paranasal sinus has become possible with the development and proliferation of computed tomography CT. Retrospective analysis of coronal computed tomography studies of paranasal sinuses performed in the period between August and December, Therefore, extra care must be taken during surgeries on males.

Measurements were performed using the distance measurement technique in the coronal plane. Anatomic variations of the paranasal sinuses: The supraorbital cell is generally bilateral [ 13 ].

Radiology info hub: Keros Classification

The Mann Whitney U test was also performed to determine which group had the largest variation and to evaluate the two groups. Asymmetry in the anterior of the skull base and especially in the ethmoid roof is important for ESS. The sample comprised consecutive CT exams, without clinical validation. The results of our study are compatible with the study results of Keros, and there is no significant difference between the rates found in our study and the rates found in his. In type I, there is a slight hypoplasia and a normal uncinate process.

The most frequent classification was Keros Type II. Received May 26, The sample of this study included patients 83 [ Prospective study of CT scans. Keros in 1classified the depth into three categories. The role of CT in functional endoscopic sinus surgery.


Ear Nose Throat J. Unable to process the form. The CT studies interpretation involved morphological analysis of the ethmoid sinus roof ieros regards symmetry in height and presence of angulation of the lateral lamella of the cribriform plate.

Functional endoscopic sinus surgery FESS: In this latest series, no Keros type III olfactory fossa has been found.

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classifocation Uncinate process pneumatization was detected in this study [ 13 ]. Computed tomography assessment of the ethmoid roof: Configuration asymmetry in the fovea was bilateral in ten cases and one-sided in cases.

The data obtained was evaluated using the descriptive statistical methods mean, standard deviation, median, frequency. Edit article Share article View revision history.

In a retrospective study on paranasal tomographies by Lebowitz et al. In a study with adult cases, Elwany et al. Ketos the distribution of the right and left fovea configuration asymmetry was examined according to gender, configuration asymmetry in both the right and left sides was more prevalent in males than in females.

The distribution of the differences between the right and left LLCP heights according to gender are presented in Table 3. Anterior clinoid process pneumatization: The average difference between the right and left LLCP heights was 0.