Search Results

You are looking at 101 - 110 of 389 items for :

  • "tuberculum sellae" x
Clear All
Restricted access

Christophe Destrieux, Médard K. Kakou, Stéphane Velut, Thierry Lefrancq and Michel Jan

Hypophyseal Fossa The sella turcica was a sagittally concave bone groove located at the posterosuperior portion of the body of the sphenoid bone. It was limited anteriorly by the tuberculum sellae and posteriorly by the dorsum sellae and posterior clinoid processes (the upper part of the clivus). Conversely, there were no lateral bone limits, and the sella turcica opened directly into the paired laterosellar spaces. The floor of the sella turcica was continuous in all of the adult specimens studied, whereas the fetal specimen was pierced by a 0.5-mm hole located just

Restricted access

Atul Goel, Mohinish Bhatjiwale and Ketan Desai

, 79 patients). Fig. 3. Line drawing showing landmarks used for measurements. b = basal line; c = Chamberlain's line; t = tuberculum sellae—torcular herophili line; w = Wackenheim's clival line. The basal angle is the angle between lines b and w. The Klaus height index on plain radiography is the distance from the tip of the odontoid process to line t. Fig. 4. Line drawing showing the parameters for measurement of the modified omega line. Line A is drawn along the hard palate. Line B is parallel to line A and passes through the center

Restricted access

Kiyoshi Saito, Keizo Fukuta, Masakatsu Takahashi, Yukio Seki and Jun Yoshida

elevated with the olfactory mucosa and the frontal dura. Using an epidural approach, the compressed dura mater was separated from the lesioned bone and was followed from the planum sphenoidale to the tuberculum sellae, sellar floor, dorsum sellae, and the clivus. Both optic canals were released. The optic nerves showed compression and thinning that was worse on the left side. The inferomedial dural walls of the cavernous sinus on both sides and the pituitary dura were thoroughly exposed. The tumor was multilobular. Anteriorly, cysts had walls of fibrous tissue or mucosal

Full access

Susumu Oikawa, Kazuhiko Kyoshima and Shigeaki Kobayashi

Object

The authors report on the surgical anatomy of the juxtadural ring area of the internal carotid artery to add to the information available about this important structure.

Methods

Twenty sides of cadaver specimens were used in this study. The plane of the dural ring was found to incline in the posteromedial direction. Medial inclination was measured at 21.8š on average against the horizontal line in the anteroposterior view on radiographic studies. Posterior inclination was measured at 20.3š against the planum sphenoidale in the lateral projection, and the medial edge of the dural ring was located 0.4 mm above the tuberculum sellae in the same projection. The lateral edge of the tuberculum sellae was located 1.4 mm below the superior border of the anterior clinoid process. The carotid cave was situated at the medial or posteromedial aspect of the dural ring; however, two of the 20 specimens showed no cave formation. The carotid cave contained the subarachnoid space in 13 sides, the arachnoid membrane only in three sides, and the extraarachnoid space in two sides. The authors propose that the marker of the medial side of the dural ring, which is more proximal than the lateral, is the tuberculum sellae in the lateral view on radiographic studies. In the medial aspect of the dural ring the intradural space can be situated below the level of the tuberculum sellae because of the existence of the carotid cave.

Conclusions

The authors found that an aneurysm arising from the medial side of the juxtadural ring area even below the tuberculum sellae is a potential cause of subarachnoid hemorrhage.

Restricted access

Susumu Oikawa, Kazuhiko Kyoshima and Shigeaki Kobayashi

the planum sphenoidale as the reference line in the lateral view. In the lateral projection, the location of the dural ring was measured above the tuberculum sellae and below the superior border of the anterior clinoid process on the reference line, which is perpendicular to the planum sphenoidale on the tuberculum sellae ( Fig. 2 ). We excluded specimens in which the appropriate reference lines could not be drawn for measurement. Incidence, location, depth, and contents of the carotid cave were studied with the aid of a surgical microscope. The location of the

Restricted access

Akira Teramoto, Yoichi Yoshida, Naoko Sanno and Shigeru Nemoto

venous sampling from the cavernous and the inferior petrosal sinus was performed in the same way. Catheters were flushed with heparinized saline during the procedure and systemic heparinization was not used. In 10 patients with a pituitary lesion who were recently studied (Cases 26–35), blood samples were taken separately from the anterior, middle, and posterior portions of each cavernous sinus (multispot sampling, Fig. 1 ). In this study, the middle portion was defined as the midpoint between the tuberculum sellae and the dorsum sellae in the lateral view ( Fig. 1

Restricted access

Douglas Kondziolka, Elad I. Levy, Ajay Niranjan, John C. Flickinger and L. Dade Lunsford

fractionated radiation therapy 5 (5%) TABLE 2 Locations of meningiomas in brain observed at radiosurgery in 99 patients Location No. of Patients cavernous sinus 30 petrous apex 22 tentorium 8 cerebellopontine angle 6 foramen magnum 4 sphenoid ridge 4 falx 4 tuberculum sellae 4 clivus 3 intraventricular 3 parasagittal 3 confluence of falx & tentorium 3 planum sphenoidale 2 jugular foramen 1 torcular herophili 1 anterior clinoid 1 Radiosurgical Technique All patients underwent stereotactic radiosurgery performed using the gamma knife (Elekta Instruments, Atlanta, GA

Restricted access

Lorenzo Magrassi, Claudio De-Fraja, Luciano Conti, Giorgio Butti, Lodovico Infuso, Stefano Govoni and Elena Cattaneo

transitional rt olfactory groove 64, F transitional tuberculum sellae 62, M meningothelial lumbar region 64, F meningothelial rt olfactory groove 46, M meningothelial rt sphenoid wing 62, M meningothelial lt parietal convexity 60, F meningothelial lt parietal convexity 66, M meningothelial rt olfactory groove The dura specimens were obtained from patients who had died of cardiovascular accidents without any sign of preexisting disease of the brain. Samples of dura mater were obtained from a region rich in arachnoidal granulations that are supposed to contain the normal

Restricted access

John D. Heiss, Nicholas Patronas, Hetty L. DeVroom, Thomas Shawker, Robert Ennis, William Kammerer, Alec Eidsath, Thomas Talbot, Jonathan Morris, Eric Eskioglu and Edward H. Oldfield

and the fourth ventricle. The spatial relationship of the most caudal portion of the cerebellar tonsils to the foramen magnum and the morphological characteristics of the cerebellum were also assessed. Finally, the size of the posterior fossa was estimated by measuring: 1) the length of the suboccipital bone, the entire clivus, and the portion of the clivus below the synchondrosis; and 2) the angle of the tentorium with respect to a line between the torcula and the tuberculum sellae (Twining's line). 10, 18 Radiological Imaging of Physiology Phase-contrast cine MR

Restricted access

encased in a tuberculum sellae meningioma Masahiro Ogino Masashi Nakatsukasa Toru Nakagawa Ikuro Murase November 1999 91 5 871 874 10.3171/jns.1999.91.5.0871 Fatal secondary increase in serum S-100B protein after severe head injury Andreas Raabe Volker Seifert November 1999 91 5 875 877 10.3171/jns.1999.91.5.0875 Iatrogenic pneumocephalus secondary to intravenous catheterization Todd P. Thompson Elad Levy Emanuel Kanal L. Dade Lunsford November 1999 91 5 878 880 10.3171/jns.1999.91.5.0878 Stereotactic radiofrequency ablation for the treatment of gelastic seizures