Daniel Le Gars

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Findings in several cases are used to demonstrate that certain vertebral angiomas may not be congenital and can ultimately provoke medullary or radicular neurologic complications. Radiotherapy is the usual treatment but is not always accepted unconditionally close to spinal cord. Destruction of angioma and consolidation of vertebral column can be obtained(More)
In this chapter, the authors compared the results of the national series (262 patients) with the relevant data from the literature, in order to establish the optimal therapeutic management. Colloid cysts represent the main tumor encountered within the third ventricle (145 cases). Sudden death from colloid cysts is documented in this series, but(More)
OBJECT Stereotactic biopsy procedures are an everyday part of neurosurgery. The procedure provides an accurate histological diagnosis with the least possible morbidity. Robotic stereotactic biopsy needs to be an accurate, safe, frameless, and rapid technique. This article reports the clinical results of a series of 100 frameless robotic biopsies using a(More)
The aim of this study was to determine the neuropsychological consequences of a middle interhemispheric approach for the removal of tumors of the third or lateral ventricles. A retrospective analysis of eight callosotomized patients for ventricular tumors (three males/five females; mean age: 48.7 ± 11.2 years; education level: 11.9 ± 2.9 years) and eight(More)
This study focuses on the surgical approaches to intraventricular tumors which have developed within the cavity of the lateral ventricle. The first section is dedicated to embryology and describes the wrapping of the telencephalic vesicles around the thalamus and the morphogenesis of basal nuclei and commissures. In the second section, the anatomy of the(More)
BACKGROUND AND PURPOSE To evaluate behavioral and cognitive deficits following anterior communicating artery aneurysm rupture and determine critical lesion locations. METHODS We investigated 74 patients with standardized cognitive tests and behavioral inventory. Two examiners rated MRI signal abnormalities in 51 predetermined regions of interest.(More)
OBJECTIVE Phase Contrast Magnetic Resonance Imaging (PCMRI) is a noninvasive technique that can be used to quantify variations of flow during the cardiac cycle. PCMRI allows investigations of blood flow dynamics in the main arteries and veins of the brain but also the dynamics of cerebrospinal fluid. These cerebral flow investigations provide a description(More)
UNLABELLED The data from 262 cases of third ventricle (V3) tumors treated in 21 Departments of Neurosurgery in France between 1980 and 1995 were collected in this series. These tumors were frequent in young adults, and 17.5% of the patients were children. Colloid cysts (55%) and gliomas (19%) were the most frequent lesions. Other tumors were rare, or(More)
OBJECT The authors used a fiber dissection technique to describe the temporal stem and explain the tendency of malignant tumors to spread within both the frontal and temporal lobes. The authors focused on the morphological characteristics and course of various fasciculi of the temporal stem, including the uncinate fascicle, occipitofrontal fascicle,(More)
OBJECT In the current literature, there is a lack of a detailed map of the origin, course, and connections of the ventral callosal radiations of the human brain. METHODS The authors used an older dissection technique based on a freezing process as well as diffusion tensor imaging to investigate this area of the human brain. RESULTS The authors(More)