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Topic: Sylvian aqueduct

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	Pinealomas (Site not responding. Last check: 2007-10-24)
		When these tumors occlude the cerebral aqueduct, obstructive hydrocephalus with intracranial hypertension occurs; if the superior colliculus and pretectal area are involved, characteristic eye signs develop, which may include impairment of upward gaze and abnormalities of the pupil, paralysis or spasm of convergence and nystagmus retractorius.
		This sylvian aqueduct syndrome is indicative of a periaqueductal lesion.
		Parinaud's syndrome, the paralysis of upward gaze alone, is often and incorrectly used as synonymous with the sylvian aqueduct syndrome.
	www.pinealomas.com (2382 words)

	AANS.org \| Education and Meetings \| AANS Scientific Journals \| Neurosurgical Focus
		In a few patients with shunted hydrocephalus, usually related to aqueductal stenosis, shunt malfunction can be revealed by a sylvian aqueduct syndrome (Parinaud's syndrome or pretectal syndrome) characterized by vertical gaze restriction, abnormal pupillary reaction, upper lid retraction, and convergence--retraction eye movements.
		The causes of hydrocephalus included malformative aqueductal stenosis in 17 cases, meningitis in four cases, intraventricular hemorrhage in two cases, tectal tumor in one case, posterior fossa tumor in two cases, vein of Galen malformation in one case, and toxoplasmosis in one case.
		The causes of the hydrocephalus were congenital aqueductal stenosis in five cases, posterior fossa tumor in two cases, vein of Galen malformation in one case, posthemorrhagic hydrocephalus in one case, toxoplasmosis in one case, and meningitis in one case.
	aans.org /education/journal/neurosurgical/dec98/5-6-p2.asp?... (4784 words)

	Reviews Vol 1, No 1 (Site not responding. Last check: 2007-10-24)
		The ideal candidate to endoscopic third ventriculostomy (ETV) is the patient affected by hydrocephalus induced by primitive or secondary isolated obstruction of the sylvian aqueduct.
		In this form of hydrocephalus, whatever the pathological process responsible for the stenosis (aqueductal forking, membrane, periaqueductal gliosis, tectal dysplasia, mesencephalic amartoma etc.) the obstruction to CSF circulation is precisely delimited to the sylvian aqueduct.
		Differential diagnosis from aqueductal stenosis is easy because of the good visibility of the sylvian aqueduct that is significantly widened on the whole length, is usually funnel shaped and presents increased CSF flow with higher flow rate and no measurable flow on the Magendie's and Lushcka's foramens [Carpentier 1999].
	www.wfns.org /principal_reviews2-1c.html (8685 words)

	MedFriendly.com: Cerebral aqueduct
		The cerebral aqueduct is a narrow opening in the brain that connects the third ventricle with the fourth ventricle, allowing cerebrospinal fluid to flow between these two areas.
		The cerebral aqueduct drains cerebrospinal fluid from the third ventricle to the fourth ventricle.
		The lateral ventricle is also known as the aqueduct of sylvius, aqueductus sylvii, sylvian aqueduct, aqueductus mesencephali, aqueductus cerebri, aqueduct of cerebrum, and iter a tertio ad quartum ventriculum.
	www.medfriendly.com /cerebralaqueduct.html (616 words)

	AANS.org \| Education and Meetings \| AANS Scientific Journals \| Neurosurgical Focus
		Patients with obstructive triventricular hydrocephalus due to primary aqueductal stenosis, toxoplasmosis, or tectomesencephalic, pineal, or posterior thalamic tumors were considered to be ideal candidates for third ventriculostomy, with a reported success rate of 75%.[19] The advent of magnetic resonance (MR) imaging and neuroendoscopy refined both the preoperative diagnosis and the surgical technique.
		Only patients with obstructive triventricular hydrocephalus due to purely mechanical obstruction of the sylvian aqueduct (primary aqueductal stenosis, toxoplasmosis, tectomesencephalic tumor or hamartoma, pineal tumor, posterior thalamic tumor, and all cases of shunt malfunction presenting with sylvian aqueduct syndrome[1] or global dorsal midbrain dysfunction) were included.
		This is particularly true in cases in which aqueductal stenosis is induced by a mechanical obstruction within the lumen of the aqueduct, such as septations or membranes, or by an extrinsic compression due to a tumor of the tectal plate or pineal gland, with no additional obstacle in the CSF pathways distal to the obstruction.
	www.aans.org /education/journal/neurosurgical/apr99/6-4-3.asp (4218 words)

	Article References
		Globus JH, Bergman P: Atresia and stenosis of the aqueduct of Sylvius.
		Hatcher MA Jr, Klintworth GK: The Sylvian aqueduct syndrome.
		Lavender JP, Du Boulay GH: Aqueduct stenosis and cystic expansion of the suprapineal recess.
	www.thejns-net.org /jns/issues/v90n2/ref/n0900227_ref.html (917 words)

	Normal pressure hydrocephalus due to membranous obstruction of the sylvian aqueduct -- Murphy et al. 28 (8): 835 -- ... (Site not responding. Last check: 2007-10-24)
		Normal pressure hydrocephalus due to membranous obstruction of the sylvian aqueduct -- Murphy et al.
		Normal pressure hydrocephalus due to membranous obstruction of the sylvian aqueduct
		hydrocephalus, a membranous obstruction of the aqueduct of Sylvius was
	intl.neurology.org /cgi/content/abstract/28/8/835 (106 words)

	mrcp q 2
		From there it passes through the aqueduct of the Sylvius to the 4th ventricle.
		It passes through the hiatus of the tent to the Sylvian fissures and from there to the para-sagittal area.
		It is believed that CSF takes one to two hours to reach the basal cisterns, 3 to 4 hours to reach the sylvian fissure and 10 to 12 hours to spread over the cerebral subarachnoid space.
	www.aippg.net /forum/viewtopic.php?t=27456 (251 words)

	Sylvian aqueduct syndrome as a sign of acute obstructive hydrocephalus in children -- Chattha and Delong 38 (3): 288 -- ...
		Sylvian aqueduct syndrome as a sign of acute obstructive hydrocephalus in children -- Chattha and Delong 38 (3): 288 -- Journal of Neurology, Neurosurgery, and Psychiatry
		Sylvian aqueduct syndrome as a sign of acute obstructive hydrocephalus in children
		and other features of the Sylvian aqueduct syndrome are reported.
	jnnp.bmjjournals.com /cgi/content/abstract/38/3/288 (222 words)

	Article Figures and Tables
		256 matrix, two excitations) obtained through the upper pons revealing dilation of the lower aqueduct and abnormal hyperintensity of the tegmentum at the pontine level.
		Continuous simultaneous transtentorial pressure recordings obtained during shunt malfunction in a patient with a clinical picture of severe global rostral midbrain dysfunction.
		1 = pul-vinar; 2 = red nucleus; 3 = substantia nigra; 4 = pineal gland; 5 = posterior commissure; 6 = pretectal area; 7 = posterior commissure nuclei; 8 = sylvian aqueduct; 9 = nucleus of Darkschewitsch; 10 = interstitial nucleus of Cajal.
	www.thejns-net.org /jns/issues/v90n2/fig_tab/n0900227_f6.html (892 words)

	Untitled Document
		1 = corpus callosum; 2 = fornix; 3= commissured lamina; 4 = infundibulum; 5 = Sylvian aqueducts; 6 = cerebellum; 7 = lamina quadrigemina; 8 = thalami; 9 = 3rd ventricle.
		The image reproduces the image visible in A: Note the cavum septi pellucidi (1), the space corresponding to the third ventricle shifted upward (2); also visible are the Sylvian aqueduct (3) and the 4th ventricle in front of the third median of the cerebellum (5).
		CC = corpus callosum; 1 = CSP; 2 = fornix; 3 = 3 ventricle; 4 = mesencephalon, pons and medulla; 5 = 4th ventricle; 6 = cerebellum; 7 = Sylvian aqueduct; 8 = cisterna magna; 9 = lamina quadrigemina; 10 = epiphysis.
	www.3d-us.org /abstract.htm (12830 words)

	Teaching Files - USC Radiology
		A well circumscribed mass in the pineal body which is heterogeneous to hyperintense on T-1 and hyperintense on T-2 and FLARE images with little or no enhancement post contrast.
		This mass is obstructing the Sylvian aqueduct, and has no surrounding edema.
		Intra cranial epidermoids comprise less than 1% of intra cranial neoplasms, although as many as 4% have been reported as incidental finding on MR or autopsies.
	www.usc.edu /schools/medicine/departments/radiology/office/Academics/TeachFile/2000Cases/Case10_diagnosis.html (321 words)

	Image Database - Case Selected (Site not responding. Last check: 2007-10-24)
		Sagittal T1-weighted MR image (SE 500/20) shows a 1.6 x 2 cm bulbous-tectal mass (white arrow) causing obstruction of the Sylvian aqueduct (fl arrow) and hydrocephalus.
		Tectal gliomas are usually low-grade astrocytomas that enlarge the tectum and may completely obliterate the aqueduct causing hydrocephalus.
		Hydrocephalus due to an aqueductal lesion may cause the tectum to appear short and thick.
	www.unipa.it /sparacia/db_x/php/tf.php?cod=0 (423 words)

	Sylvian Aqueduct
		Sylvian aqueduct syndrome as a sign of acute obstructive
		Sylvian aqueduct, (Franciscus Sylvius, 1614–1672, Dutch anatomist and physiologist), see cerebral aqueduct.
		The Sylvian aqueduct syndrome and neurofibromatosis -- Lean 64 (4):
	www.5minuteracingsystem.com /94/sylvian-aqueduct.html (164 words)

	Medical Dictionary: Sylvian aqueduct syndrome - WrongDiagnosis.com - WrongDiagnosis.com
		Medical Dictionary: Sylvian aqueduct syndrome - WrongDiagnosis.com - WrongDiagnosis.com
		Terms that may be interchangeable with Sylvian aqueduct syndrome:
		By using this site you agree to our Terms of Use.
	www.wrongdiagnosis.com /medical/sylvian_aqueduct_syndrome_printer.htm (123 words)

	Medical Dictionary: Cerebral aqueduct - WrongDiagnosis.com
		Cerebral aqueduct: a canal connecting the third and fourth ventricles
		Cerebral aqueduct : Narrow channel in the mesencephalon that connects the third and fourth ventricles.
		A hierarchical classification of Cerebral aqueduct: The following list attempts to classify Cerebral aqueduct into categories where each line is subset of the next.
	www.wrongdiagnosis.com /medical/cerebral_aqueduct.htm (179 words)

	Headway For Hydrocephalus: When Cerebrospinal Fluid Can't Go With The Flow
		In a study appearing in the July issue of the Journal of Clinical Investigation, Sanbing Shen and colleagues from the University of Aberdeen uncover how CSF flow is regulated throughout the brain.
		The Sylvian aqueduct is a canal between two cavities of the brain, through which CSF passes.
		In addition, shorter, inefficient cilia were observed on the cells lining the aqueduct.
	www.medicalnewstoday.com /medicalnews.php?newsid=46553&nfid=crss (347 words)

	Fourth Ventricle (Site not responding. Last check: 2007-10-24)
		According to one theory the failure of these foramina to open during embryonic development leads to enlargement of the fourth ventricle, with secondary.
		An irregular cavity that extends from the obex to a communication with the sylvian aqueduct and is enclosed between the cerebellum.
		Three dimensional interactive cross-sections of the human brain, which may be rotated and major structures identified by the user.
	ventricle.protofind.com /fourth-ventricle.htm (420 words)

	The Sylvian aqueduct syndrome and neurofibromatosis -- Lean 64 (4): 272 -- British Journal of Ophthalmology
		The Sylvian aqueduct syndrome and neurofibromatosis -- Lean 64 (4): 272 -- British Journal of Ophthalmology
		Articles by Lean, J. British Journal of Ophthalmology, 1980, Vol 64, 272-275
		A 23-year-old man initially presented with the Sylvian aqueduct syndrome
	bjo.bmjjournals.com /cgi/content/abstract/64/4/272 (90 words)

	Medical Dictionary: Sylvian aqueduct - WrongDiagnosis.com - WrongDiagnosis.com
		Sylvian aqueduct: a canal connecting the third and fourth ventricles
		Terms that may be interchangeable with Sylvian aqueduct:
		A hierarchical classification of Sylvian aqueduct: The following list attempts to classify Sylvian aqueduct into categories where each line is subset of the next.
	www.wrongdiagnosis.com /medical/sylvian_aqueduct_printer.htm (155 words)

	The Brain Tumor Foundation
		In addition, the tectal plate sits over the Sylvian Aqueduct - a thin tube within the midbrain through which ventricular fluid flows.
		Pressure on the tectal plate results in obstruction of the aqueduct, as well as a build up of ventricular fluid in the lateral and third ventricles.
		This is called obstructive hydrocephalus, a condition which can cause headaches, coma and eventually death if left untreated.
	www.braintumorfoundation.org /Pineal.asp (367 words)

	Ultrasound Clinical Handbook - Browsing Documents
		CSF is mainly produced in the choroid plexuses situated in the lateral ventricles, flowing from either side into the third ventricle via the foramen of Monro and then through the Sylvian aqueduct to reach the fourth ventricle, located within the brainstem.
		CSF then exits the ventricular system through the foramina of Luschka and Magendie into the cisterna magna and subarachnoid space to be reabsorbed by the granulations of Pacchioni located along the superior sagittal sinus.
		Obstructive hydrocephalus is by the far the most common type and is usually associated with spina bifida, the Arnold Chiari type II malformation, aqueduct stenosis, and the Dandy-Walker malformation.
	www.pear.co.nz /asum/doc.php?d=427 (1232 words)

	Infoplease Search: aqueduct
		(Encyclopedia) aqueduct [Lat.,=conveyor of water], channel or trough built to convey water, chiefly for providing...
		(Encyclopedia) Croton Aqueduct, 38 mi (61 km) long, SE N.Y., carrying water from the Croton River basin to New...
		(Encyclopedia) Delaware Aqueduct, SE N.Y., 85 mi (137 km) long, carrying water from the Rondout Reservoir,...
	www.infoplease.com /search?fr=iptn&query=Aqueduct&in=all (143 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations (Site not responding. Last check: 2007-10-24)
		Energy Citations Database (ECD) Document #4251716 - Effects of irradiation on the cilia of the Sylvian aqueduct.
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		Effects of irradiation on the cilia of the Sylvian aqueduct.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=4251716 (108 words)

	Aqueduct of cerebrum - definition from Biology-Online.org
		An ependymal-lined canal in the mesencephalon about 20 mm long, connecting the third to the fourth ventricle.
		Synonym: aqueductus cerebri, aqueduct of cerebrum, aqueductus sylvii, iter a tertio ad quartum ventriculum, sylvian aqueduct.
		This page was last modified 21:16, 3 October 2005.
	www.biology-online.org /dictionary/Aqueduct_of_cerebrum (113 words)

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