sphenoid


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Related to sphenoid: Sphenoid sinus

sphenoid

[′sfē‚nȯid]
(crystallography)
An open crystal, occurring in monoclinic crystals of the sphenoidal class, and characterized by two nonparallel faces symmetrical with an axis of twofold symmetry.
(science and technology)
Wedge-shaped.
References in periodicals archive ?
A CT scan of the sinuses without contrast revealed hyperdense soft tissue opacifying the right sphenoid sinus extending to the right posterior ethmoidal air cells with osseous erosive changes; erosion of the right anterior wall of the sphenoid sinus, posterior right ethmoidal air cell septi; and mild erosion of the posterior medial walls of the maxillary sinus and medial wall of the orbit with minimal soft tissue extending to the orbital apex.
Moreover, inclusion criteria for healthy adult subjects were no history of oncologic illness, hemiplegia, intracranial lesions, Parkinson disease, having surgical operation related region, psychiatric or medical illness and surgery of the sphenoid sinus, sinonasal tumor or nasal polyposis and chronic rhinosinusitis.
For Endoscopic optic nerve decompression, standard technique of FESS was used, the natural ostium of the sphenoid sinus waswidely opened.
However, these cranial nerve dysfunctions due to a sphenoid mucocoele have previously been reported by Yong et al.
It arises more commonly from the sphenoid bone and to a lesser extent from the temporal bone [1, 6].
Caption: Figure 1: Sagittal section of T2-weighted magnetic resonance imaging showing well-defined hyperintense expansile soft tissue lesion arising from the nasopharynx, invading sphenoid and clivus (red arrow).
However, to our best knowledge, no cases of CH secondary to sphenoid mucocele have ever been reported.
Preoperative CT imaging showed a smoothly marginated, soft tissue density mass centered at the posterior nasal septum with extension into the nasopharynx and bulging into the right sphenoid sinus (Figure 1).
The multidetector computed tomography (MDCT) of the paranasal sinuses illustrated a nonenhanced soft tissue density lesion in the right sphenoid sinus and no visualization of the superior wall of the right sphenoid sinus, adjacent to the right optic canal, as well as a wall that became thinner by either pressure effect of right sphenoid lesion or bony destruction (Figure 2).
Foreign body within sphenoid sinus: Multidetector-row computed tomography (MDCT) demonstration.
Nowadays, computed tomography (CT) and magnetic resonance imaging (MRI) are used to evaluate patients with suspected neurological problems; incidental abnormalities of the sphenoid sinus are noted for further management.
Caption: Figure 1: Sagittal T1 diffusion weighted MRI showing a complete opacification of the left sphenoid sinus.