Symptomatic subependymoma of the fourth ventricle

1981 ◽  
Vol 55 (5) ◽  
pp. 841-844 ◽  
Author(s):  
Angelo Gandolfi ◽  
Riccardo E. Brizzi ◽  
Filomeno Tedeschi ◽  
Paolo Paini ◽  
Pellegrino Bassi
Keyword(s):  
Differential Diagnosis ◽  
Computerized Tomography ◽  
Posterior Fossa ◽  
Fourth Ventricle ◽  
Frozen Section ◽  
Surgical Removal ◽  
Tumor Type ◽  
Content Type ◽  
Direct Involvement ◽  
Fine Print

✓ Symptomatic subependymomas of the fourth ventricle are rare and usually not included in the preoperative differential diagnosis of tumors in this region. The case of a 63-year-old man with fourth ventricle subependymoma is described. For several years he had suffered with nausea and vomiting, and now presented signs of direct involvement of the posterior fossa. He was investigated preoperatively with computerized tomography, but the ultimate diagnosis was not suspected at that time. The tumor was diagnosed as an subependymoma at operation and was totally excised. This tumor type can easily be recognized on intraoperative frozen section, and its diagnosis should always lead to an attempt at complete surgical removal.

Isolated ventricles following intraventricular hemorrhage

1985 ◽  
Vol 62 (3) ◽  
pp. 357-362 ◽  
Author(s):  
Theodore W. Eller ◽  
Joseph F. Pasternak
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
Fourth Ventricle ◽  
Intraventricular Hemorrhage ◽  
Clinical Signs ◽  
Premature Neonate ◽  
Content Type ◽  
Isolated Ventricle ◽  
Tomography Scanning ◽  
Fine Print

✓ Panventricular enlargement often follows intraventricular hemorrhage in the premature neonate. During a recent 12-month period, the authors identified five infants who required shunting because of symptomatic post-hemorrhagic hydrocephalus, which was progressive despite serial lumbar punctures and the use of indwelling subcutaneous ventricular reservoirs. In the first 6 months following placement of the initial shunt, four of the infants required an additional shunt for isolated ventricles. Two children had isolation of the lateral ventricles and required bilateral shunts. Two other children had isolation of the fourth ventricle from the lateral ventricular system and required posterior fossa shunts. All of the children were treated successfully using multiple shunts. In all cases, progressive dilation of the isolated ventricle was unaccompanied by the usual clinical signs of shunt malfunction. It appears that isolated ventricular systems are common following post-hemorrhagic hydrocephalus and these children must be followed closely with ultrasound and computerized tomography scanning.

Supratentorial intracerebral hemorrhage following posterior fossa surgery

1978 ◽  
Vol 49 (6) ◽  
pp. 881-886 ◽  
Author(s):  
Stephen J. Haines ◽  
Joseph C. Maroon ◽  
Peter J. Jannetta
Keyword(s):  
Differential Diagnosis ◽  
Intracerebral Hemorrhage ◽  
Computerized Tomography ◽  
Posterior Fossa ◽  
Diagnostic Method ◽  
Posterior Fossa Surgery ◽  
Content Type ◽  
Level Of Consciousness ◽  
Fine Print

✓ Five cases of supratentorial intracerebral hemorrhage following posterior fossa surgery are reported. Possible etiologies are discussed, but in only one case can a definite etiology (hypertension) be found. The differential diagnosis of declining level of consciousness after posterior fossa surgery must include supratentorial intracerebral hemorrhage, and computerized tomography seems to be the diagnostic method of choice.

Hemangiopericytoma of the spinal canal

1978 ◽  
Vol 49 (6) ◽  
pp. 914-920 ◽  
Author(s):  
Darrell J. Harris ◽  
Victor L. Fornasier ◽  
Kenneth E. Livingston
Keyword(s):  
Endothelial Cells ◽  
Differential Diagnosis ◽  
High Risk ◽  
Spinal Canal ◽  
Vertebral Column ◽  
Soft Tissues ◽  
Surgical Removal ◽  
Vascular Neoplasm ◽  
Content Type ◽  
Fine Print

✓ Hemangiopericytoma is a vascular neoplasm consisting of capillaries outlined by an intact basement membrane that separates the endothelial cells of the capillaries from the spindle-shaped tumor cells in the extravascular area. These neoplasms are found in soft tissues but have rarely been shown to involve the spinal canal. This is a report of three such cases. Surgical removal of the tumor from the spinal canal was technically difficult. A high risk of recurrence has been reported but in these three cases adjunctive radiotherapy appeared to be of benefit in controlling the progression of the disease. These cases, added to the six cases in the literature, confirm the existence of hemangiopericytoma involving the vertebral column with extension into the spinal canal. This entity should be included in the differential diagnosis of lesions of the spinal canal. The risk of intraoperative hemorrhage should be anticipated.

Teratoma of the fourth ventricle

1973 ◽  
Vol 38 (3) ◽  
pp. 355-357 ◽  
Author(s):  
Robert J. Morelli
Keyword(s):  
Fourth Ventricle ◽  
Rare Case ◽  
Surgical Removal ◽  
Malignant Teratoma ◽  
Content Type ◽  
Fine Print

✓ The author reports a rare case in which a primary malignant teratoma presented as an obstructing mass in the fourth ventricle. The tumor was not cystic but well encapsulated, and a gross total surgical removal was accomplished. A fatal recurrence occurred within 3 months.

Lead encephalopathy presenting as a posterior fossa mass

1986 ◽  
Vol 65 (5) ◽  
pp. 713-715 ◽  
Author(s):  
J. Frederick Harrington ◽  
Timothy B. Mapstone ◽  
Warren R. Selman ◽  
Pamela Galloway ◽  
Carl Bundschuh
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
Content Type ◽  
Lead Encephalopathy ◽  
Fine Print

✓ A case of lead encephalopathy with clinical and computerized tomography evidence of a midline posterior fossa mass is presented. The pathophysiology and the predilection for posterior fossa involvement are discussed.

Diagnostic value of 201Tl—single-photon emission computerized tomography studies in cases of posterior fossa hemangioblastomas

2001 ◽  
Vol 95 (2) ◽  
pp. 292-297 ◽  
Author(s):  
Takeo Kondo ◽  
Toshihiro Kumabe ◽  
Shin Maruoka ◽  
Takashi Yoshimoto
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
Single Photon ◽  
Photon Emission ◽  
Magnetic Resonance Images ◽  
Thallium 201 ◽  
Homologous Region ◽  
Single Photon Emission ◽  
Content Type ◽  
Fine Print

Object. The 201Tl uptake index was evaluated for its usefulness in formulating a diagnosis of hemangioblastoma. Thallium-201—single-photon emission computerized tomography (SPECT) studies were performed in nine patients harboring hemangioblastomas in the posterior fossa and in five patients (six lesions) with gliomas in the posterior fossa. Methods. The 201Tl uptake index was defined as the ratio of mean counts of isotope per pixel in the tumor to mean counts of isotope per pixel in the homologous region of the healthy brain. The 201Tl uptake indices of the early image (TlE) and that of the delayed image (TlD) were calculated. The isotope retention index (RI) was calculated as (TlE − TlD)/TlE. The TlE was 2.7 ± 0.7 in hemangioblastomas and 2.9 ± 1.7 in gliomas (mean ± standard deviation). The TlD was 1.5 ± 0.4 in hemangioblastomas and 2.4 ± 1.6 in gliomas. There were no significant differences between hemangioblastomas and gliomas when TlEs and TlDs were compared. The isotope RI was 0.43 ± 0.07 in hemangioblastomas and 0.15 ± 0.1 in gliomas, showing a significantly higher RI in hemangioblastomas compared with gliomas (p < 0.01). Conclusions. Thallium-201 washout is significantly faster in hemangioblastomas. Hemangioblastoma is biologically benign, but contains a rich capillary network that forms a hypervascular tumor bed. Variations in its appearance on magnetic resonance images may cause difficulties in the differential diagnosis of hemangioblastoma. Thallium-201 SPECT studies can be used to distinguish hemangioblastomas from gliomas in the posterior fossa.

Hydrocephalus due to membranous obstruction of the fourth ventricle

1971 ◽  
Vol 35 (6) ◽  
pp. 672-676 ◽  
Author(s):  
A. Loren Amacher ◽  
Larry K. Page
Keyword(s):  
Posterior Fossa ◽  
Fourth Ventricle ◽  
Clinical Findings ◽  
Posterior Fossa Tumor ◽  
Cerebellar Development ◽  
Rare Entity ◽  
Content Type ◽  
Operative Findings ◽  
Membranous Obstruction ◽  
Fine Print

✓ Four patients with hydrocephalus due to membranous obstruction of the fourth ventricle are presented. This rare entity produced radiographic and clinical findings suggestive of posterior fossa tumor. Operative findings included normal cerebellar development and a translucent membrane just above the foramen of Magendie. Etiological possibilities are discussed.

Dermoid tumors occurring at the site of previous myelomeningocele repair

1986 ◽  
Vol 65 (6) ◽  
pp. 779-783 ◽  
Author(s):  
R. Michael Scott ◽  
Samuel M. Wolpert ◽  
Louis E. Bartoshesky ◽  
Seymour Zimbler ◽  
George T. Klauber
Keyword(s):  
Differential Diagnosis ◽  
Lower Extremity ◽  
Computerized Tomography ◽  
Neurological Deterioration ◽  
Bladder Function ◽  
Content Type ◽  
Surgical Exploration ◽  
Myelomeningocele Repair ◽  
Tomography Scanning ◽  
Fine Print

✓ Four children with previously repaired myelomeningoceles presented toward the end of the first decade or early in the second decade of life with deteriorating lower-extremity and bladder function. Myelography and computerized tomography scanning demonstrated irregular filling defects at the area of the myelomeningocele repair, and surgical exploration disclosed dermoid tumors that were adherent to the placode and adjacent roots. Dermoid tumors should be considered in the differential diagnosis of neurological deterioration in children with a repaired myelomeningocele.

Endoscopic removal of cysticercal cysts within the fourth ventricle

1999 ◽  
Vol 91 (2) ◽  
pp. 340-345 ◽  
Author(s):  
Marvin Bergsneider
Keyword(s):  
Fourth Ventricle ◽  
Treatment Options ◽  
Primary Treatment ◽  
Surgical Removal ◽  
Endoscopic Removal ◽  
Content Type ◽  
Suboccipital Craniectomy ◽  
The Mean ◽  
Optimum Management ◽  
Fine Print

✓ There is no consensus as to the optimum management of patients who harbor cysticercal cysts within the fourth ventricle. Compared with the alternative treatment options of anthelmintic medication and/or cerebrospinal fluid shunt placement, the surgical removal of the cyst has the advantage of eliminating the inflammatory nidus and potentially obviating the need for a complication-prone shunt. Here, an endoscopic surgical approach is described and proposed as an alternative to the standard suboccipital craniectomy for removal of cysticercal cysts within the fourth ventricle.A retrospective analysis of five consecutive endoscopic cases was performed. Endoscopic removal of all cysts within the fourth ventricle was successful in each case. The mean length of operative time was short and blood loss was insignificant. The endoscopic procedure was safe and associated with minimal postoperative discomfort in most patients.In properly selected patients, the endoscopic removal of cysticercal cysts located within the fourth ventricle should be considered as the primary treatment for this condition.

Isolated fourth ventricle as a complication of ventricular shunting

1978 ◽  
Vol 49 (6) ◽  
pp. 910-913 ◽  
Author(s):  
John C. Hawkins ◽  
Harold J. Hoffman ◽  
Robin P. Humphreys
Keyword(s):  
Computerized Tomography ◽  
Fourth Ventricle ◽  
Obstructive Hydrocephalus ◽  
Normal Function ◽  
Shunt Malfunction ◽  
Cerebellar Dysfunction ◽  
Content Type ◽  
Isolated Fourth Ventricle ◽  
Ventricular Shunting ◽  
Fine Print

✓ Signs of cerebellar dysfunction combined with signs suggestive of shunt malfunction developed in three children with obstructive hydrocephalus. Shunt function was normal. In all cases, the cerebellar signs persisted and computerized tomography scans revealed enlargement of the fourth ventricle. Shunting of the fourth ventricle returned the patients to normal function.

Sign in / Sign up

Export Citation Format

Share Document