Co-existence of the Onodi cell with the variation of perisphenoidal structures

Özturan, Orhan; Yenigün, Alper; Degirmenci, Nazan; Aksoy, Fadlullah; Veyseller, Bayram

doi:10.1007/s00405-012-2325-8

Cited by 27 publications

(36 citation statements)

References 14 publications

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“…An Onodi cell may modify the surrounding anatomic structures, but it usually does not determine an alteration of the intrasphenoidal course of the vidian canal, being however significant as related to the anterior clinoid pneumatization 19 . When Onodi cells are present, the sphenoid sinus ostium shows tendency to be located inferiorly to a level observed in the absence of Onodi cells 20 .…”

Section: Resultsmentioning

confidence: 99%

Variations of sphenoid pneumatization: a CBCT study

Craiu

Săndulescu

Rusu

2015

Romanian Journal of Rhinology

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The transsphenoidal approach of the skull base has become a usual surgical procedure which targets the sellar, parasellar and suprasellar regions of the middle cranial fossa, as well as Meckel's cave and the clivus 1 . Anatomical studies are essential in increasing the anatomical knowledge and improving surgical performance 2 . Although pituitary surgery is traditionally within the realm of neurosurgeons, otolaryngologists became active partners in the surgical management of hypophysis to decrease rates of complications and morbidity 3 , being known that the posterior ethmoid air cells and the sphenoid sinus are surrounded by more vital structures than any other sinus 4 .The sphenoid sinus is probably the most variably pneumatized structure of the skull; its recesses are able to facilitate minimally invasive access to different surgical targets, thus it play roles in the selection of surgical procedures 1 . From a developmental point of view, the sphenoid sinus will not reach its full extension until adolescence and it may occasionally extend into the vomer, ethmoid, palatine and occipital bones, as well as in different parts of the sphenoid bone, such as the anterior clinoid process, the lesser wing and the great wing, and the pterygoid process 5 . The pneumatizations of the anterior clinoid process and pterygoid process are surprisingly common 6 .According to its sagittal extension, as related to the sella turcica, the sphenoid sinus was classified either in three, or in four types. There are authors describing sellar, presellar and conchal types of sinus, which occur in 55%, 17% and, respectively, 28% of cases 7 . This classification in three types was suggested by Congdon in 1920 8 . Other authors also considered the postsellar pneumatization 9 which can occur in more than 50% of cases 10 . There were not found differences in regard to age, gender and ethnicity 9 .The lateral recess of the sphenoid sinus was evaluated in relation to the pterygopalatine fossa, and was classified in six types: type I, in which such recess is absent in the posterior fossa wall, type II, when the recess reaches above the vidian canal, type III with the recess engaged between the vidian and maxillary nerve canals, type IV, of alar pneumatization, type V, in which the root of the pterygoid process lodges the pneumatic expansion and type VI, of combined alar and pterygoid pneumatizations 11 . aBSTRaCT BaCKgROund. The pneumatization pattern of the sphenoid sinus seems rather unpredictable, as resulted from previous

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Section: Resultsmentioning

confidence: 99%

Variations of sphenoid pneumatization: a CBCT study

Craiu

Săndulescu

Rusu

2015

Romanian Journal of Rhinology

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“…The incidence of the Onodi cell differs greatly when comparing past studies. In studies based on CT, Onodi cell incidence is mostly low (8‐24%) . However, in their detailed study based on sagittal CT, Tomovic et al reported that the incidence of the Onodi cell was 65.3%, although they did not provide details about their method of identification.…”

Section: Discussionmentioning

confidence: 99%

Identification of Onodi cell and new classification of sphenoid sinus for endoscopic sinus surgery

Wada

Moriyama

Edamatsu

et al. 2015

Int Forum Allergy Rhinol

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“…No significant difference has been found in terms of the presence of sphenoethmoidal cells in patients with chronic rhinosinusitis compared to normal controls. 9 The optic nerve protruded into 80 per cent of sphenoethmoidal cells compared to only 18 per cent of normal sphenoid sinuses ( p < 0.01). In a study of 999 CT scans, sphenoethmoidal cells were identified in 16 per cent of cases and were bilateral in two-thirds of cases, as indicated by a characteristic cruciform appearance on coronal CT images (Figure 4).…”

Section: Case Fourmentioning

confidence: 92%