Posterior petrous meningioma with secondary trigeminal neuralgia: microsurgical resection after stereotactic radiosurgery (case report and literature review).

According to the literature, cerebellopontine angle tumors cause secondary trigeminal neuralgia and other symptoms of neurovascular compression in 1-9.9% of cases. We present a 58-year-old patient with left-sided secondary trigeminal neuralgia caused by ipsilateral posterior petrous meningioma.

Lanthanoid-doped quaternary garnets as phosphors for high brightness cathodoluminescence-based light sources.

Gadolinium-yttrium- aluminum-gallium garnets (GYAGG) doped and codoped with Eu, Tb, and Ce were manufactured as ceramics to develop long-wavelength phosphors for high-brightness white light sources based on cathodoluminescence (CL). The CL light yield (LY) of Tb-doped ceramics at high-intensity electron beam excitation is shown to be more than twice as high as that of the conventional phosphor YAG:Ce, whereas codoping with Eu to redshift the chromaticity results in reducing the LY approximately to the level of YAG:Ce. The LY might be substantially improved by using a mix of Tb- and Eu-doped GYGAG powders instead of a single codoped GYGAG to produce ceramic phosphor.

[Microvascular decompression in trigeminal neuralgia following vertebrobasilar dolichoectasia].

Objective: To analyze our own results with literature data and substantiate microvascular decompression in patients with trigeminal neuralgia (TN) following vertebrobasilar dolichoectasia (VBD).

Material And Methods: A total of 504 patients with TN underwent surgery in 1998-2018. Patients with TN following VBD were included into a retrospective study.

Venous compression as a cause of trigeminal neuralgia.

Aim: The study objective was to verify venous compression as a cause of trigeminal neuralgia (TN) and to define the optimal surgical tactics for TN patients.

Material And Methods: Four hundred twenty one patients were operated on for TN at the Neurosurgical Department of the City Hospital №2 from 1998 to 2015. Veins in the trigeminal nerve root entry zone, as a significant compression factor, were identified in 40 patients (9.

[Changes in bone structure according to the results of investigations on biosatellites of the "BION" series].

Noninvasive technologies of bone investigations measure largely the main skeletal sites and are not quite suitable to have a look at the bone internal organization in situ. However, there are data obtained noninvasively in experiments on board the space biosatellites. The review is dedicated to analysis and comparison of the evidence for the bone organic and mineral matrix restructuring due to microgravity.