One of the mysteries of the English language finally explained.
A compound bone which forms the base of the cranium, behind the eye and below the front part of the brain. It has two pairs of broad lateral ‘wings’ and a number of other projections, and contains two air-filled sinuses.
- ‘Another such feature are the deep internasal cavities on either side of the sphenoid.’
- ‘Somewhat further back, the dura has been separated from the body of the sphenoid bone.’
- ‘It is attached superiorly to the spine of the sphenoid and the region of the petrotympanic fissure.’
- ‘Metastasis to the brain can occur by way of Batson's plexus or by direct extension from adjacent structures such as the sphenoid bone or sinuses.’
- ‘A large groove (sinus of Breschet) may occur on the intracranial face, parallel to the coronal suture and extending from the bregma to the lesser wing of the sphenoid.’
Relating to the sphenoid bone.
- ‘The maxillary sinus is most commonly involved; however, most patients with radiologic maxillary sinusitis have abnormalities of the ethmoid and sphenoid sinuses.’
- ‘Its accuracy, however, is questionable in suspected ethmoid, frontal, or sphenoid involvement.’
- ‘Further CT scans have not demonstrated any additional sphenoid sinus or skull base erosion nor recurrent tumour five years after surgery.’
- ‘In 1998, the tumor recurred with involvement of the nasal cavity and sphenoid and ethmoid sinuses.’
- ‘Magnetic resonance imaging showed a mass bilaterally in the nasopharynx and the sphenoid sinuses.’
Mid 18th century: from modern Latin sphenoides, from Greek sphēnoeidēs, from sphēn ‘wedge’.
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