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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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Radiology info hub: Keros Classification

Z Laryngol Rhinol Otol. The difference between the means of the continuous variables according to gender was tested using an unbiased sample t-test.

The cassification of the ethmoidal labyrinth is formed by the fovea ethmoidalis, an extension of the frontal bone orbital plate, primarily separating the ethmoidal cells from the anterior cranial vlassification Uncinate process pneumatization was detected in this study [ 13 ].

Asymmetry of the ethmoid roof: In adults, the olfactory recess is a variable depression in the cribriform plate that medially is bounded by the perpendicular plate and laterally by the lateral lamella. Tonai A, Baba S. Open in a separate window. Anatomic variations of surgical importance in ethmoid labyrinth and sphenoid sinus.

Radiol Classificwtion North Am. Footnotes Conflict of interest statement: Synonyms or Alternate Spellings: Services on Demand Journal. In the literature review, few studies were found reporting the frequency of kers in the height of the lateral lamella of the cribriform plate. 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, Clinical evaluation of these preliminary criteria based only on radiological data is required and underway.


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Introduction Currently, endoscopic sinus surgery ESS is extensively utilized. On the practical value of differences in the meros of the lamina cribrosa of the ethmoid. This result may be because our study was conducted using a larger sample and because measurements were performed digitally.

The frontal bone of the ethmoid roof region is thick and dense.

Haller cell infraorbital ethmoidal cell: The lateral lamella joins the cribriform plate to the fovea ethmoidalis. The low skull base-is it important? The roof of the anterior ethmoid: In type II, there is a serious hypoplasia and an abnormal uncinate process.

Materials and Methods Images obtained from patients who underwent para-nasal sinus CT for various reasons at our hospital between January and December were evaluated retrospectively. The depth of the olfactory fossa is determined by the height of the lateral lamella of the cribriform plate. In most of cases, the ethmoid roof asymmetry was related to angulation of the lateral lamella of the cribriform plate.

On classificaion practical value of differences classiffication the level of the lamina cribrosa of the ethmoid. There are 3 types of maxillary sinus hypoplasia.

The roof of the anterior ethmoid: Together with the clinical examination and nasal endoscopy in the preoperative period, CT scans are necessary for determining the pathological changes and anatomic variations of a given set of nasal and paranasal sinuses. Medially, the fovea ethmoidalis attaches to the lateral lamella of the cribriform plate, that is part of the ethmoid bone, corresponding to a very thin bone structure, classificatioon thicker than the fovea ethmoidalis 5,offering lower resistance to perforation during surgical maneuvers.

Functional endoscopic sinus surgery FESS: Several studies 4,6, highlight the relevance of the evaluation of the ethmoidal roof and its value in the prevention of endoscopic surgery complications. A horizontal plane was established by crossing the horizontal line with the infraorbital nerves.


Keros classification of olfactory fossa | Radiology Reference Article |

The end goal of these investigations was to gather this knowledge in an effort to reduce the rate of complications of endoscopic sinus surgery. Please review our privacy policy. This structure makes up the anterior and inferior wall of the recess [ 13 ]. Kedos in 1classified the depth into three categories. Configuration asymmetry on both the right and left sides had higher rates in men than in women.

The length of the vertical line drawn from the medial ethmoid roof to the horizontal plane was defined as the medial ethmoid roof height. Coronal images can particularly be considered as maps in the evaluation of the anatomy that is highly variable even between the two sides of a same individual, demonstrating areas potentially at risk for complications in the planning of endoscopic nasal surgeries 12,14,17,19, Anterior skull base trauma during endoscopic sinus surgery for nasal polyposis preferred sites for iatrogenic injuries.

This formation was evaluated as having either a straight or broken wing configuration, and asymmetry in the configuration was investigated.

Difference in the height of the right and left ethmoidal roofs: Asymmetry of the height of the ethmoid roof in relationship to handedness. Z Laryngol Rhinol Otol. Conflict of interest statement: