Planum sphenoidale meningioma. Attachment and blood supply.

By reviewing clinical and radiological data and surgical findings of 35 so-called "olfactory groove meningioma" cases, the authors conclude that this is not a homogenous group. According to the attachment and blood supply they differentiate two varieties, the planum sphenoidale meningioma (PM) and the olfactory meningioma (OM). It seems possible to distinguish both groups clinically and with regard to the localization of hyperostosis and pneumencephalographic and angiographic findings.

Intra- and suprasellar tumours: surgical results.

Experience gained with the operation of 108 intra- and suprasellar tumours and the results of the surgical intervention are presented. The transcranial -- subfrontal approach of hypophyseal tumours offers today a circumspect and, in a considerable part of the cases, radical solution. Intratracheal anaesthesia eliminates the surgical risk and radiotherapy prevents relapse.

Granulomatous glomerulonephritis, without systemic disorder.

The case of a 12-year-old girl dying of renal insufficiency is described. At autopsy granulomatous glomerulonephritis was found without any systemic disease. The glomerular light-, immunofluorescent- and electron microscopic changes were studied.

The value of electrostimulation in epileptic focus localization.

The ES is a non-physiological stimulus of the brain. However it represents an important and indispensable part of stero-EEG investigation since it is an easily adjustable method, capable of inducing typical electro-clinical seizures. From the clinical and electrical responses elicited by ES and from the data of the stimulation tresh-old, we are in agreement with other authors, we feel we can also distinguish several different reacting zones in the epileptic brain: 1.

Surgical and stereotactic attempts in intractable epilepsy.

The eras of surgical treatment of epilepsy, and experience with operations for epilepsy, especially those for temporal epilepsy, and stereotactic attempts based on depth multilead electrodes investigations and electro stimulation are described. Classical exposure and focus resection seems adequate whilst stereotaxy ought to be improved for the selective elimination of target structure activating the coded seizure pattern.

Stereotactic diagnosis of epilepsy by electrical stimulation.

The effects and role of electrostimulation have been studied in 44 acute stereo-EEG explorations. Analysis of the stimulus threshold and of the clinical and electrical responses allows to separate the epileptogenic, the irritative, the "physiologically" reacting and the actually "silent" areas of the epileptic brain. Electrical stimulation is a valuable diagnostic method to reveal the focality, the multiplicity and the degree of the seizure disposition in epilepsy.

Effects of stereotactic lesions in intractable epilepsy.

The eras of surgical treatment of epilepsy are described and experience with the epilepsy operations, especially those obtained in the course of temporal epilepsy operations, and stereotactic attempts based on multielectrode EEG investigations, and ES. Classical, exposure and resection still seems adequate whilst stereotaxy develops in the selective elimination of the structure activating the coded seizure-pattern.

Experiences with radically operated acoustic tumours.

A series of one hundred acoustic tumours submitted to radical operation is reviewed. The authors emphasize the possibilities of early correct diagnosis without contrast studies, draw attention to variations in nature and site of the tumour, and evaluate preservation of the facial nerve.