Sagittal suture as an external landmark for the superior sagittal sinus

2001 ◽  
Vol 94 (6) ◽  
pp. 985-987 ◽  
Author(s):  
R. Shane Tubbs ◽  
George Salter ◽  
Scott Elton ◽  
Paul A. Grabb ◽  
W. Jerry Oakes
Keyword(s):  
Superior Sagittal Sinus ◽  
Sagittal Suture ◽  
Middle Portion ◽  
Maximum Displacement ◽  
Content Type ◽  
Sagittal Sinus ◽  
The Right ◽  
External Landmark ◽  
Fine Print

Object. Historically, the sagittal suture has been used as an external landmark to indicate the middle portion of the superior sagittal sinus (SSS). The goal of this study was to verify this relationship. Methods. The authors examined 30 adult cadavers to reveal the location of the SSS with respect to the sagittal suture. Their findings demonstrated that the SSS is deviated to the right of the sagittal suture in the majority of observed specimens, although the maximum displacement to the right side was never more than 11 mm. Conclusions. This information should be useful to the neurosurgeon who must be aware of the SSS and its relationship with superficial skull landmarks.

Meningiomas arising from the falcotentorial junction

1995 ◽  
Vol 82 (5) ◽  
pp. 726-738 ◽  
Author(s):  
Shoji Asari ◽  
Tomohide Maeshiro ◽  
Susumu Tomita ◽  
Masamitsu Kawauchi ◽  
Nobuyoshi Yabuno ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Mr Imaging ◽  
Superior Sagittal Sinus ◽  
Posterior Part ◽  
Detailed Knowledge ◽  
Content Type ◽  
Sagittal Sinus ◽  
Adjacent Structures ◽  
Upward Gaze Palsy ◽  
Fine Print

✓ Meningiomas arising from the falcotentorial junction are extremely rare. The authors describe the clinical features, neuroimaging studies, and results of surgical treatment of meningiomas of the falcotentorial junction and clarify the characteristics of this lesion based on a review of the literature and seven patients treated at their institution. The most common symptoms resulted from intracranial hypertension. Upward-gaze palsy appeared in only one patient. Computerized tomography (CT) showed no specific findings, but there was no evidence of edema around the tumor. Magnetic resonance (MR) imaging revealed a round, smooth-bordered mass with a peritumoral rim, without edema, and showing marked contrast enhancement. The multiplanar capability of MR imaging delineated the relationship between the tumor and adjacent structures better than did CT. Detailed knowledge of the vascular structures, especially evidence of occlusion of the galenic venous system and the development of collateral venous channels, is critical for successful surgery; stereoscopic cerebral angiography is necessary to achieve this aim. The seven patients described developed five types of collateral venous channels: through the basal vein of Rosenthal to the petrosal vein, through the veins on the medial surface of the parietal and occipital lobes to the superior sagittal sinus, through superficial anastomotic veins, through veins of the posterior fossa to the transverse or straight sinus, and through the falcian veins to the superior sagittal sinus. The first three types mainly developed after occlusion of the galenic system. The tumors were removed through the occipital transtentorial approach with a large window at the posterior part of the falx. A favorable prognosis for patients undergoing surgical treatment of falcotentorial junction meningiomas can be expected if detailed neuroimaging studies and microsurgical techniques are used.

The pseudodelta sign in acute head trauma

1988 ◽  
Vol 69 (6) ◽  
pp. 867-868 ◽  
Author(s):  
Joel W. Yeakley ◽  
John S. Mayer ◽  
Larry L. Patchell ◽  
K. Francis Lee ◽  
Michael E. Miner
Keyword(s):  
Head Trauma ◽  
Superior Sagittal Sinus ◽  
Ct Scans ◽  
Content Type ◽  
Sagittal Sinus ◽  
Contrast Enhanced Ct ◽  
Contrast Enhanced ◽  
Enhanced Ct ◽  
Triangular Area ◽  
Fine Print

✓ The “delta sign” is a triangular area of high density with a low-density center seen on contrast-enhanced computerized tomography (CT) scans in the location of the superior sagittal sinus. It indicates thrombosis of the sinus. The authors describe the “pseudodelta sign,” which is similar but is seen on non-contrast-enhanced CT scans and which has a high correlation with hemorrhage secondary to acute head trauma.

Stereotactic radiosurgery for dural arteriovenous fistula involving the superior sagittal sinus

2002 ◽  
Vol 97 ◽  
pp. 481-483 ◽  
Author(s):  
Keisuke Maruyama ◽  
Masahiro Shin ◽  
Hiroki Kurita ◽  
Masao Tago ◽  
Takaaki Kirino
Keyword(s):  
Arteriovenous Fistula ◽  
Stereotactic Radiosurgery ◽  
Gamma Knife ◽  
Dural Arteriovenous Fistula ◽  
Superior Sagittal Sinus ◽  
Gamma Knife Radiosurgery ◽  
Content Type ◽  
Sagittal Sinus ◽  
Fine Print

✓The authors present a case of ruptured dural arteriovenous fistula primarily draining into the superior sagittal sinus, which was successfully treated by gamma knife radiosurgery.

Endoscopic anatomy of the chordae willisii in the superior sagittal sinus

2004 ◽  
Vol 101 (5) ◽  
pp. 832-835 ◽  
Author(s):  
Mansoor Sharifi ◽  
Jacek Kunicki ◽  
Pawel Krajewski ◽  
Bogdan Ciszek
Keyword(s):  
Superior Sagittal Sinus ◽  
Tap Water ◽  
Digital Camera ◽  
Content Type ◽  
Sagittal Sinus ◽  
Structural Relationships ◽  
Human Cadavers ◽  
Bridging Veins ◽  
Different Diameters ◽  
Fine Print

Object. Chordae willisii are structures located in the lumen of the superior sagittal sinus (SSS). It is thought that they act as flow-improving structures within the sinuses. There are few anatomical descriptions of chordae willisii, and all previous observations were performed through standard anatomical dissections. The purpose of this study was to visualize and describe structural and topographical features of the chordae willisii with the aid of rigid endoscopy. Methods. Twenty-five SSSs obtained from fresh human cadavers during autopsies were the material for this study. Specimens were flushed with tap water to remove clots. Bridging veins emptying into the sinus were ligated, and continuous flow of a saline solution through the sinus in a physiological direction was achieved by connecting the sinus to an irrigating system. Rigid endoscopes of different diameters (2.7–4.5 mm) and optic (0 and 30°) were inserted into the lumen of the sinus. The endoscope was connected to a digital camera and a video system to allow for recording of the observed structures. Finally, the sinuses were opened and the chordae willisii were dissected using standard anatomical methods. The chordae willisii were observed in all examined specimens. Three different types of the cords were found: lamellar, trabecular, and valvelike types. The most common type was the valvelike (mixed) one, which comprised 45.1% of all cords. The chordae willisii were most commonly observed in the parietooccipital region of the SSS. Conclusions. Witout disturbing any structural relationships, the use of endoscopy allowed visualization and description of intraluminal structures as they behaved physiologically.

Diffuse calvarial meningioma

1999 ◽  
Vol 90 (5) ◽  
pp. 970-973 ◽  
Author(s):  
Shigetaka Anegawa ◽  
Takashi Hayashi ◽  
Ryuichiro Torigoe ◽  
Yoshihiko Furukawa
Keyword(s):  
Intracranial Hypertension ◽  
Superior Sagittal Sinus ◽  
Content Type ◽  
Sagittal Sinus ◽  
Fine Print

✓ An extremely unusual calvarial meningioma in a 77-year-old woman is reported. The meningioma spread widely and symmetrically within the calvaria and grew extracranially within the scalp as well as intracranially. Reactive dural hyperplasia induced narrowing of the intracranial space and occlusion of the superior sagittal sinus, resulting in intracranial hypertension. After external decompression, the patient's symptoms markedly resolved. The authors review the literature on calvarial meningioma, discuss its pathogenesis, and propose mechanisms responsible for the patient's intracranial hypertension.

Intracranial venous sinus hypertension: cause or consequence of hydrocephalus in infants?

1984 ◽  
Vol 60 (4) ◽  
pp. 727-736 ◽  
Author(s):  
Christian Sainte-Rose ◽  
Jacques LaCombe ◽  
Alain Pierre-Kahn ◽  
Dominique Renier ◽  
Jean-François Hirsch
Keyword(s):  
Superior Sagittal Sinus ◽  
Jugular Vein ◽  
Venous Pressure ◽  
Lateral Sinus ◽  
Jugular Venous Pressure ◽  
Content Type ◽  
Obstructive Lesion ◽  
Sagittal Sinus ◽  
Increased Icp ◽  
Fine Print

✓ From a previous study of achondroplasia as well as from the observation of patients with hydrocephalus associated with craniostenosis, the authors have concluded that an increased superior sagittal sinus venous pressure (SSVP) could be the cause of the enlarged ventricles. However, other workers have demonstrated that an increased SSVP could be the consequence of increased intracranial pressure (ICP). Therefore, the authors undertook a study to determine if there was a physiological test that could distinguish between rare instances of increased SSVP caused by structural and irreversible narrowing of the sinus and those caused by increased ICP. In 20 hydrocephalic infants and children, pressure was simultaneously measured in the lateral ventricle, the superior sagittal sinus, and the jugular vein. Stable baseline pressures were recorded, as well as the variations observed after the withdrawal of an amount of cerebrospinal fluid (CSF) sufficient to lower ICP to zero. Similar recordings were taken after reinjection of an equal quantity of CSF. In all of the patients, SSVP was increased, but not as much as the ICP. In the cases of hydrocephalus without any associated cranial malformation, and therefore without any likely anatomical interruption of the sinus, CSF withdrawal induced a simultaneous decrease of ICP and SSVP. However, whereas ICP could be lowered to zero, SSVP never fell below the jugular venous pressure, which remained stable (around 5 mm Hg) throughout the recording session. Results were different when sinography demonstrated an anatomical interruption of the sinus, as in cases of hydrocephalus associated with achondroplasia or craniostenosis. In these cases, although ICP was normally lowered by CSF withdrawal, SSVP remained nearly unchanged, usually greater than the jugular venous pressure. The present study demonstrated that SSVP recording during ICP variations induced by CSF withdrawal permits differentiation between a reversible collapse of the sigmoid sinus due to increased ICP and a fixed obstructive lesion of the sinuses. Based upon this test and the results of sinography, the authors inserted a venous bypass between the lateral sinus and a jugular vein in three patients.

Atresia of the rostral superior sagittal sinus: substitute parasagittal venous channels

1973 ◽  
Vol 38 (5) ◽  
pp. 602-607 ◽  
Author(s):  
Harry A. Kaplan ◽  
Jefferson Browder
Keyword(s):  
Superior Sagittal Sinus ◽  
Clinical Importance ◽  
Content Type ◽  
Sagittal Sinus ◽  
Developmental Variants ◽  
Fine Print

✓ Failure of development of a rostral superior sagittal sinus results in concomitant embryonal establishment of substitute dural and cerebral venous pathways. The longer the segment of atresia of this sinus, the more extensive the compensatory venous channels. These developmental variants assume clinical importance in the interpretation of cerebral angiograms.

scholarly journals Parietal Foramen as A Landmark to Locate Intracranial Vascular and Parenchymal Structures

2020 ◽  
Author(s):  
Pedro Brainer-Lima ◽  
Alessandra Brainer-Lima ◽  
Maria Rosana Ferreira ◽  
Paulo Brainer-Lima ◽  
Marcelo Valença
Keyword(s):  
Parietal Lobe ◽  
Superior Sagittal Sinus ◽  
Average Distance ◽  
Air Embolism ◽  
Neurosurgical Procedures ◽  
Parietal Region ◽  
Sagittal Suture ◽  
Emissary Vein ◽  
Sagittal Sinus ◽  
The Right

Abstract The aim of this study was to define the location of the parietal foramina (PF) with reference to skull landmarks and correlate the PF with cerebral and vascular structures to optimize neurosurgical procedures in the intracranial compartment. Two hundred and thirty-eight parietal bones studied by magnetic resonance imaging (MRI) of 119 patients were reviewed. The cephalometric points, inion, bregma, sagittal suture and lambda were used as anatomical references to locate the PF and define its anatomical relationships to parenchymal cerebral structures, especially some eloquent areas. The PF was identified in the MRI in 83 of the 119 individuals (69.7%) and was located at an average distance of 9.5 ± 0.8 cm (mean ± SD) posteriorly and 0.9 ± 0.3cm laterally to the Bregma. In over 90% of cases, the PF was located within a 2 cm radius of the bregma-PF distance’s mean value. Surgeons operating in the parietal region should be aware of the frequency of PF (69.7%), its location (superolateral to lambda) and its stable relationship with underlying anatomical structures. 88% of the 62 left PF’s were situated within 1cm, laterally to the left margin of the superior sagittal sinus (SSS). 60% of the right PF were situated within 1.3 cm laterally from the right margin of the SSS, while 40% were directly above the SSS. We propose that the PF should be used as the reference for the superior sagittal sinus during its course through the parietal lobe, as its constancy overtakes other commonly used landmarks (sagittal suture and midline). In conclusion, clinicians should be aware of the PF to both avoid iatrogenic injury to an emissary vein that courses through it that can lead to air embolism and as a guide to maneuvering through the parietal region.

Effect of positional changes and jugular vein compression on the pressure gradient across the arachnoid villi and granulations of the dog

1973 ◽  
Vol 38 (6) ◽  
pp. 722-728 ◽  
Author(s):  
D. Gordon Potts ◽  
Vishnu Deonarine
Keyword(s):  
Cerebrospinal Fluid ◽  
Pressure Gradient ◽  
Subarachnoid Space ◽  
Superior Sagittal Sinus ◽  
Jugular Vein ◽  
Content Type ◽  
Sagittal Sinus ◽  
Venous Compression ◽  
Filtration System ◽  
Fine Print

✓ The pressure gradient between the distal subarachnoid space and the superior sagittal sinus was measured in dogs and the effects of positional changes and jugular venous compression investigated. This pressure gradient remained almost constant in the head-up, head-down, and horizontal positions. These findings would be consistent with a passive filtration system for the return of cerebrospinal fluid from the distal subarachnoid space to the superior sagittal sinus and adjacent veins. The pressure gradient rose with jugular venous compression.

Obstruction of the superior sagittal sinus caused by parasagittal meningiomas: the role of collateral venous pathways

1994 ◽  
Vol 81 (4) ◽  
pp. 520-524 ◽  
Author(s):  
Kazunari Oka ◽  
Yoshinori Go ◽  
Hideo Kimura ◽  
Masamichi Tomonaga
Keyword(s):  
Superior Sagittal Sinus ◽  
Content Type ◽  
Sagittal Sinus ◽  
Venous Phase ◽  
End To End ◽  
Parasagittal Meningioma ◽  
Fine Print

✓ The authors present studies of eight patients who had obstruction of the superior sagittal sinus caused by parasagittal meningioma. The results indicate that meningeal veins and end-to-end anastomoses of the superficial veins of the cerebrum play important roles as collateral venous pathways. This assessment suggests that, in patients with obstruction of the superior sagittal sinus, venous phase angiography should be carefully interpreted before surgery is attempted for parasagittal meningiomas.

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