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At least 19 recordsLinked to original sources
PubMed1987

A simple technique to open the posterior wall of the third ventricle.

Third ventriculostomy is an operating technique which is mostly used in benign adult aqueductal stenosis. The most important stage of this operation is the manipulation of the basal membrane of the third ventricle. A technique which facilitates the opening of the posterior wall of the third ventricle is presented.

Cerebral Aqueduct↗
PubMed2002

Acute distortion of the anatomy of the third ventricle during third ventriculostomy. Report of four cases.

The authors report on four third ventriculostomy procedures in which upward ballooning of the third ventricular floor occurred immediately after perforation of the floor and withdrawal of a Fogarty catheter. The floor herniated into the third ventricle, hindering the endoscopic view. Preoperative magnetic resonance imaging demonstrated a similar anatomy in all four cases, consisting of hydrocephalus, extreme dilation of the third ventricle, and disappearance of the interpeduncular cistern due to a very thin, membranous floor of the third ventricle, which herniated downward, draping over the basilar artery. The authors suggest that excessive rinsing in combination with this anatomical configuration provoked the phenomenon of upward ballooning of the third ventricular floor, which is described in this report.

Adult↗
PubMed1994

Ependymomas of the third ventricle.

Third ventricular ependymomas are rare tumors that have not been specifically examined. Four cases of these tumors are reported. The presenting symptoms included headache, ataxia, vertigo, and Parinaud's syndrome. All the patients underwent computed tomographic scanning and cerebral angiography, followed by craniotomy and microsurgical resection of the tumor. In addition, all patients had or developed symptomatic obstructive hydrocephalus requiring shunting procedures. Three of the patients are alive with a follow-up of 4 to 12 years. It is remarkable that these tumors are so rare, given that the ependymal surface area of the third ventricle is greater than that of the fourth. The management of these tumors should include aggressive surgical resection, radiation therapy, and cerebrospinal fluid diversion.

Adult↗
PubMed1991

[Experimental study on destruction of the third ventricle floor in the midline:--examination for the trans-third ventricle approach].

Surgery of a basilar bifurcation aneurysm is a very difficult operation in neurosurgery. For the treatment of this lesion, two methods are widely used at present: one is the subtemporal approach developed by Drake and the other is the pterional approach by Yasargil. With either approach, however, the treatment of a basilar bifurcation aneurysm accompanied by megadolichobasilar anomaly is difficult and hazardous due to the necessity for excessive retraction of the brain, nerves and vessels. Recently we successfully treated two cases of ruptured basilar bifurcation aneurysm complicated with megadolichobasilar anomaly by the trans-third ventricle approach. The floor of the third ventricle was already partly destroyed by aneurysmal rupture in both cases. It was required to make a small split in the third ventricle floor in order to get a wider operative field. Postoperatively, however, no influence from the splitting of the floor was seen. An experimental study was carried out in dogs to determine the influence from the destruction of the floor of the third ventricle. Using microsurgical techniques, the third ventricle floor was opened along the midline. Dogs were sacrificed 30 days after surgery. The following items were evaluated before, during, and after surgery: clinical symptom, blood pressure, pulse, body temperature, serum electrolytes, serum osmotic pressure, pituitary hormones (anterior lobe), cortisol, ADH (2.5mol NaCl loading test), electroencephalogram, cerebral blood flow and pathological change. No significant abnormalities could be detected in endocrine and metabolic functions, and no histological changes were seen around the hypothalamus. In conclusion, it is justified to split the third ventricle floor along the midline if it is indicated.

Animals↗
PubMed1975

Scanning electron microscopy of a second type of supraependymal cell in the monkey third ventricle.

The third ventricle of monkeys has been examined with the scanning electron microscope (SEM). Two populations of supraependymal (SE) cells were distinguished on the basis of morphology and location. One type has been previously reported (Coates, '72, '73a,b,c). Another, type 2 SE cell, is now described. Type 2 SE cells were found in the third ventricle of both sexes and in all age groups although the numbers varied highly from animal to animal. The most common site for type 2 SE cells was the floor and transition zone of the third ventricle. Visualized with SEM, these cells had variable morphology, but may be characterized by a small cell body, few non-branching processes some of which were flared and surface features such as ruffled membranes. Type 2 SE cells most likely correspond to Kolmer or epiplexus cells originally described in association with the choroid plexus. As such, they are probably phagocytes.

Animals↗
PubMed1993

Hydrocephalus: slit ventricles, shunt obstructions, and third ventricle shunts: a clinical study.

In a retrospective 5 year study of patients with ventricle shunts for hydrocephalus (N = 88), studies were developed on slit ventricles in teenagers and in young adults. These studies presented here are (1) time to slit ventricles from first shunt and average upright ICP associated (N = 24); (2) upright ICP in asymptomatic long-term ventricle shunt patients without slit ventricles (N = 21), (3) clinical course of patients with uncorrected slit ventricles and lateral ventricles or third ventricle shunts (N = 31), (4) resolution of slit ventricles by Zero ICP Shunt with normal upright ICP (N = 28), (5) no resolution of slit or large ventricles in shunted patients with normal upright ICP (N = 23), and (6) unreliability of CT ventricle size (slit or enlarged) after normal upright ICP achieved (N = 28; 23). Surprisingly, slit ventricle patients with the ventricular catheter in collapsed lateral ventricles develop shunt obstruction within 20 months (21/31; 71%; 10/31 29%) patients with ventricle catheters incidentally in the third ventricle did not obstruct during the 4 1/2 year follow-up.

Adolescent↗
PubMed2000

Anatomical variants in the floor of the third ventricle; implications for endoscopic third ventriculostomy.

Longstanding hydrocephalus and raised intracranial pressure can lead to unusual anatomical variants in the floor of the third ventricle, which may be important when performing endoscopic third ventriculostomy. Two middle aged patients with symptomatic longstanding hydrocephalus had scans that showed ventricular hydrocephalus, an empty sella, and a dilated infundibular recess which herniated into the sella turcica. Endoscopic third ventriculostomy confirmed that instead of the tuber cinerum and infundibular recess, the anterior inferior floor of the third ventricle was hanging down ventral to the pons into the sellar floor. Third ventriculostomy to the prepontine cistern was made on the dorsal wall of the dilated infundibular recess to the area surrounded by the dorsum sellae, the basilar artery trunk, and the left superior cerebellar artery, with good symptomatic control. Association of the empty sella and persistence of the infundibular recess must be carefully evaluated by MRI before attempting endoscopic third ventriculostomy. Herniation of the anterior inferior floor of the third ventricle into the empty sella can lead to loss of anatomical landmarks that require special attention during third ventriculostomy.

Adult↗
PubMed1978

Meningiomas of the third ventricle.

Intraventricular third ventricle meningiomas are very rare. Fourteen cases have been previously reported. We present a case of third ventricle meningioma, and discuss aetiology, pathology, symptoms, signs, position in the ventricle, and surgical approaches.

Cerebral Ventricle Neoplasms↗
PubMed1999

Hemangioblastoma of the third ventricle.

A third ventricle tumor, in addition to a recurrent cerebellar hemangioblastoma, was found in a 47-year-old woman on follow-up magnetic resonance imaging (MRI) 5 years after operation of the cerebellar tumor. On MRI, the tumor was hypo- to isointense on T1-weighted images and hyperintense on T2-weighted images compared with the normal gray matter, and was strongly enhanced with gadolinium. The tumor was first treated with fractionated conventional external-beam radiation (5120 cGy in 16 fractions over a 4-week period), resulting in a slight decrease in size of the tumor. For a definite diagnosis and mass reduction, surgery was performed using an interhemispheric translamina terminalis approach, resulting in a partial removal of the tumor due to profuse bleeding. Histological diagnosis was hemangioblastoma. Hemangioblastomas of the third ventricle are extremely rare and have not been specifically discussed. We describe the detailed clinicopathological features of the present case together with the possible explanation for the development of this tumor in this rare location.

Cerebellar Neoplasms↗
PubMed1996

Colloid cyst of the third ventricle. Evaluation of 28 cases of colloid cyst of the third ventricle operated on by transcortical transventricular (25 cases) and transcallosal/transventricular (3 cases) approaches.

The clinical and x-ray features of 28 cases of colloid cyst of the third ventricle are described. Colloid cyst is one of the most favourable space-occupying lesions of the brain for successful surgical removal, because an exact pre-operative diagnosis is possible. The surgical approach for colloid cyst of the third ventricle is discussed and the frequency of postoperative seizure is reviewed in 28 cases and compared with the literature.

Adolescent↗
PubMed2001

Neuroendoscopic treatment of cystic craniopharyngioma in the third ventricle.

The third ventricle is a relatively uncommon location for craniopharyngiomas. Generally, craniotomy has been considered the procedure of choice in such cases. We describe a girl in whom a cystic third ventricular craniopharyngioma was successfully treated by evacuation of the cyst contents via a flexible neuroendoscope and precise placement of an Ommaya reservoir catheter within the tumor.

Child, Preschool↗
PubMed1991

Pressor effect of centrally administered sodium chloride: role of the ventral third ventricle region and the area postrema.

To determine the site(s) responsible for the central cardiovascular effect of hypertonic saline, 0.2 ml of 1.5 M NaCl was administered to anesthetized dogs via three routes, a lateral ventricle, the third ventricle and the cisterna magna. Intracisternal administration of hypertonic NaCl produced much prompter pressor and tachycardic responses than did administration via the other two routes. Covering the ventral third ventricle region with a petroleum jelly plug had the effect of abolishing the pressor response to lateral ventricular hypertonic NaCl but did not modify the response to intracisternal hypertonic NaCl. By contrast, electrolytic lesion of the area postrema attenuated the rise in blood pressure produced by the intracisternal NaCl without affecting the response to lateral ventricular NaCl. These results indicate that at least two sites, the ventral third ventricle region in the hypothalamus and the area postrema in the lower brainstem, are responsible for the acute hypertension induced by an increase in NaCl concentration in the cerebrospinal fluid of the dog.

Animals↗
PubMed1977

Transcallosal approach to third ventricle tumor: case report. Partial removal of an infundibuloma (grade I astrocytoma arising from the floor of the third ventricle).

A care is described of an astrocytoma grade 1 arising from the floor of the third ventricle, operated upon transcallosally. No disconnection symptoms were produced. Five years later the patient has above normal intelligence and is attending school at normal grade level in spite of a CT scan suggesting recurrence of the tumor.

Astrocytoma↗