Search results for "Cranial Fossa"

Subtemporal Keyhole Approach to the Suprasellar and Petroclival Region: Microanatomic Considerations and Clinical Application

1997

OBJECTIVE: To minimize surgical invasiveness, the keyhole concept is applied to the subtemporal approach. METHODS: Anatomic features were studied in 14 sides of adult cadaver heads, and the technique was used in 162 interventions. Although most of the lesions treated were 3 cm in size or smaller, larger lesions were also treated using this technique. In some cases, if needed, an endoscope-assisted microsurgical technique was used. RESULTS: The cadaveric study provided intimate experience with the microsurgical anatomy of the approach. The 162 consecutive patients who were operated on harbored various types of lesions; the most recent 43 consecutive interventions were investigated in detail.…

Endoscopic Neurosurgery and Endoscope-assisted Microneurosurgery for the Treatment of Intracranial Cysts

1998

Objective Different endoscopic techniques have been introduced into neurosurgery, but accepted terminology and definitions are still missing. We propose a terminology based on whether the endoscope is used alone or in conjunction with an operating microscope and on whether the route of surgical manipulations is through or outside the endoscope. Accordingly, procedures are categorized into endoscopic neurosurgery (EN), endoscope-assisted microneurosurgery (EAM), and endoscope-controlled microneurosurgery (ECM). Methods We treated 36 patients with intracranial arachnoid cysts (ACs) and intraventricular cysts endoscopically. The patients ranged in age from 4 months to 69 years (mean age, 31 yr…

Endoscope-assisted Brain Surgery: Part 2—Analysis of 380 Procedures

1998

Objectives Microsurgical techniques and instruments that help to reduce intraoperative retraction of normal intracranial neuronal and vascular structures contribute to improved postoperative results. To achieve sufficient control of the operating field without retraction of neurovascular components, the resection of dura and bone edges is frequently required, which, on the other hand, increases operating time and operation-related trauma. The use of endoscopes may help to reduce retraction and, at the same time, may help to avoid additional dura and bone resection. The aim of this study is to describe the principles on which the technique of endoscope-assisted brain surgery is based, to giv…

Transoral transclival removal of anteriorly placed cavernous malformations of the brainstem.

2001

BACKGROUND The natural history of brain stem cavernous malformations is unfavorable because of their high hemorrhage rate and resulting neurological deterioration among patients. However, direct surgery of intrinsic and anteriorly situated cavernomas is hazardous and leads to a bad postoperative outcome because of trauma to lateral and dorsally situated eloquent areas of the brain stem. METHODS We review the cases of two patients with symptomatic cavernous malformations of the anterior brain stem and describe the usefulness of a transoral-transclival approach. A 23-year-old man developed progressive hemihypaesthesia and paraesthesia, hemiparesis with gait ataxia, dysarthria, dysphonia, and …

Inferior altitudinal hemianopia associated with a tumor in the posterior fossa: report of a case

1984

Altitudinal hemianopias may be related to chiasmatic involvement. A case in which horizontal inferior hemianopia is associated with a tumor in the posterior fossa producing a triventricular hydrocephalus is described. The visual field defect is interpreted as a consequence of the pressure by a dilated third ventricle upon the chiasmatic area.

Influence of nerve branch of origin and extracanalicular extension of the tumor on hearing after middle fossa removal of vestibular schwannoma

2007

Neither nerve branch of origin nor extracanalicular (up to 1 cm) extension of a vestibular schwannoma (VS) influence the postoperative hearing outcome in patients operated via a middle cranial fossa (MCF) approach.To test whether the nerve branch of tumor origin and an extracanalicular, up to 1 cm, tumor extension influences hearing outcome after MCF VS surgery.This was a retrospective case review of 50 patients with postoperative pure-tone audiogram (PTA) performed later than 90 days after surgery. Twenty patients had a superior vestibular nerve (SVN) tumor and 27 patients had an inferior vestibular nerve (IVN) tumor. In three patients the nerve branch of origin of the VS could not be uneq…

Endoscopic Endonasal Resection of a Schwannoma of the Anterior Cranial Fossa.

2020

Novel clinical insights into spinal hemangioblastoma in adults: a systematic review

2021

ABSTRACT Background Hemangioblastomas are well vascularized, benign CNS tumors and the third most common primary spinal cord tumor after astrocytoma/ependymoma, occurring sporadically or as a part of an autosomal dominant von Hippel-Lindau disease in which tumors are often multiple and prone to relapse. Spinal hemangioblastomas are commonly located in the cervical cord and associated with a syrinx formation. Due to location and growth trends, they may cause significant neurological deficit, impairing patient quality of life. We conducted a systematic review to understand better clinical insights of spinal hemangioblastoma in adults and compare spinal hemangioblastoma versus posterior crania…

Intracranial Pressure and Mass Displacements of the Intracranial Contents

1976

The brain is completely surrounded by the bony skull and its closely adherent, tough, dural inner lining. This converts the enclosed space into a watertight chamber with the exception of the small, basally situated foramen magnum. In adults, these factors combine to prevent the skull from expanding. Consequently, the intracranial volume cannot fluctuate. In addition, the intracranial contents — blood, brain, and spinal fluid — are essentially noncompressible.

Familial Replicating Arachnoidal Cysts: Case Series and Review of Literature

2015

Background: Arachnoid cysts are intra-arachnoid fluid collections covered by a thin membrane that may develop throughout the cerebrospinal axis. Although the precise causative mechanism is unknown, arachnoid cyst (AC) are now generally accepted to be developmental anomalies of arachnoid. These lesions have commonly been described in the literature; however the presence of familial arachnoid cysts is quite rare. Most genetically related AC have been documented in patients with a known genetic syndrome. The current case report describes a family with four members affected by an arachnoid cyst in the same region. Methods: In addition to reviewing the current case, a literature search was condu…