Another such feature are the deep internasal cavities on either side of the sphenoid .
Magnetic resonance imaging showed a mass bilaterally in the nasopharynx and the sphenoid sinuses.
In 1998, the tumor recurred with involvement of the nasal cavity and sphenoid and ethmoid sinuses.
Further CT scans have not demonstrated any additional sphenoid sinus or skull base erosion nor recurrent tumour five years after surgery.
It is attached superiorly to the spine of the sphenoid and the region of the petrotympanic fissure.
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 .
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.
Faint, anteriorly convergent ridges extend from the sphenoidal bridge and define the shallow basisphenoid fossa.
Somewhat further back, the dura has been separated from the body of the sphenoid bone .