Anatomic variants in sinonasal CT.

Earwaker, John

doi:10.1148/radiographics.13.2.8460226

Cited by 222 publications

(243 citation statements)

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“…The latter is sparsely described in the literature. 13 According to Earwaker, 13 the bony wall of the infraorbital recess of the maxillary sinus is discrete from the ethmoid capsule. We used this concept in articulating a solid definition of Haller cells.…”

Section: Discussionmentioning

confidence: 99%

“…The lack of association between the presence of Haller cells and the ipsilateral maxillary sinusitis could also be explained on the basis of the accessory maxillary sinus ostia in the lateral nasal wall; these ostia have previously been described in 14% of patients 13 and would enhance maxillary sinus ventilation by functioning as an alternative route of drainage even in the case of mechanical obstruction of the maxillary infundibulum by a Haller cell.…”

Section: Discussionmentioning

confidence: 99%

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Cone beam CT analysis of Haller cells: prevalence and clinical significance

Mathew

Omami²,

Hand³

et al. 2013

Dentomaxillofacial Radiology

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Objectives: Haller cells are anterior ethmoid air cells located in the medial orbital floor immediately lateral to the maxillary infundibulum. The purpose of this study was to demonstrate the prevalence and relationship between the existence and size of these cells with ipsilateral maxillary sinusitis and orbital floor dehiscence as visualized on cone beam CT (CBCT) images. Methods: CBCT image volumes of 50 patients were retrieved and analysed. All CBCT images were acquired with a 9-inch field of view scan. x 2 and Cochran-Mantel-Haenszel tests were used for statistical analysis of the obtained data, and p-values of ,0.05 were considered to be statistically significant. Results: There was no statistically significant association between the existence and size of Haller cells and maxillary sinusitis. There was a significant association between Haller cells and orbital floor dehiscence. Conclusions: The explanation of maxillary sinusitis on the basis of mechanical obstruction is unlikely. This study provides evidence for the usefulness of CBCT scan in delineation of the sinonasal anatomy.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Cone beam CT analysis of Haller cells: prevalence and clinical significance

Mathew

Omami²,

Hand³

et al. 2013

Dentomaxillofacial Radiology

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“…It may involve a portion or the entire sphenoid bone. Pneumatization of even the pterygoid plates have been reported [5,6].…”

Section: Discussionmentioning

confidence: 99%

Endoscopic Repair of Lateral Sphenoid Recess Cerebrospinal Fluid Leaks

Kirtane

Lall

Chavan

et al. 2011

Indian J Otolaryngol Head Neck Surg

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Endoscopic repair of anterior cranial base has been widely reported. However there is still no uniformity in the technique of endoscopic repair of lateral sphenoid cerebrospinal fluid (CSF) leaks. To highlight the management of CSF leak or encephalocele in the lateral sphenoid recess and relate our experiences. We retrospectively reviewed the medical records of all our patients who underwent an endoscopic repair of CSF leaks in the lateral sphenoid recess during the period from September 2003 to January 2010 at our tertiary hospital. Fifteen cases with CSF leaks/encephalocele that were repaired by the endoscopic approach were included. The majority of our cases were spontaneous leaks. In all our cases we approached the site of defect by an end on approach. All our patients were successfully treated in the first attempt. Endoscopic repair of lateral sphenoid recess has shown better surgical outcome with reduced morbidity.

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“…For a sinonasal variant to be considered relevant, 1 of the following 4 must be true: The variant impairs normal drainage pathways, hinders endoscopic access to distal areas, serves as a focus for occult disease, or increases the risk of surgical error. 1 Examples of anatomic variants detectable on CT that may increase the risk of iatrogenic injury include sphenoethmoid (Onodi) cells, optic nerve or internal carotid artery protrusion into the sphenoid sinus, insertion of the intersphenoid sinus septum onto the carotid canal, and aeration of the anterior clinoid process. A sphenoethmoid cell is a posterior ethmoid cell that pneumatizes superiorly above the sphenoid sinus and posteriorly beyond the anterior sphenoid face, with the optic nerve being intimately related to its lateral wall.…”

Section: Discussionmentioning

confidence: 99%

“…Many sinonasal variants are important to identify since their presence may increase the risk of surgical error. 1 With the advent of endoscopic techniques, surgery of the paranasal sinuses has expanded to involve complex procedures that were once reserved for open approaches. Thus, it is extremely important to identify such variations from the normal sinus anatomy, especially in patients who are likely to require extended endoscopic sinus surgery for etiologies such as inverted papilloma, mucocele, trauma, or malignant tumor.…”

mentioning

confidence: 99%