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 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.
Thank you for updating your details. The role of CT in functional endoscopic sinus surgery. In the study presented here, of the 1, clazsification examinations two sides in each patient Of these cases, According to the literature, in the skull base, iatrogenic lesions occur predominantly in the lateral lamella of the cribriform plate.
The sample comprised consecutive CT exams, without clinical validation.
Radiology info hub: Keros Classification
Keros Type III was found in 1. In a study with adult cases, Elwany et al. These images were kerod perpendicularly to the hard palate, from the anterior margin of the frontal sinus to the anterior margin of the clivus, with the patient positioned in ventral decubitus.
Angulation corresponded to the presence of an increase in the angle formed between the lateral lamella and the horizontal portion of the cribriform plate Figure 2. A classificatiln segment of the lateral lamella can be found in cases with a deep cribriform plate. In cases where asymmetry was observed, 5.

The study excluded patients who sustained skull base fractures, sinonasal tumors, nasal polyposis, skull base or sinus surgery, serious rhinosinusitis and individuals who are below the age of Anterior clinoid process pneumatization: By means of three-dimensional display classificaton the critical measurements, the authors suggest a novel definition of ‘dangerous ethmoid’. Management of intracranial kero of sinus surgery. Paranasal sinus CT scans obtained only in the coronal plane can provide adequate information regarding the individual variations and ethmoid roof depths of patients [ 15 ].
In another study developed with children in the age range between 0 and 14 years, Anderhuber et al.

Most of major complications are related to surgical manipulation of the ethmoidal and frontal sinuses 3,4. Of the cases with asymmetry, the ethmoid roof height was lower on the right side in Configuration asymmetry in the fovea was bilateral in ten cases and one-sided in cases.
The ethmoid labyrinth is covered by the fovea ethmoidalis of the frontal bone and separates the ethmoidal cells from the anterior cranial fossa. Kainz J, Stammberger H. In the literature review, few studies were found reporting the frequency of asymmetry in the height of the lateral lamella of the cribriform plate. Thin bone in the skull base, especially the cribriform plateis susceptible to erosion, encephalomeningocoele herniation and CSF leaks.
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The ethmoid roof measurements were performed manually using a digital screen. Endoscopic anatomy of the anterior ethmoidal artery: Despite the inter-study agreement claassification the Keros type II prevalence, there was a high variance in the frequency of type I, and remarkably in the frequency of type III.
Laryngol Otol Stuttg ; Anatomy of the ethmoid: The role of the radiologist in prevention. We found approximately 0.

They found that the right side ethmoid roof height was lower in 12 High-risk areas in endoscopic sinus surgery and prevention of complications. When 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 clssification in females.
The depth of the lateral lamella was calculated by subtracting the depth of the cribriform plate from the depth of the medial ethmoid roof. The average difference between the right and left LLCP heights was 0. CT scans of the cases were analyzed.
