The role of diffusion tractography in refining glial tumor resection.

The role of diffusion tractography in refining glial tumor resection. Brain Struct Funct. 2020 Mar 16;: Authors: Vanderweyen DC, Theaud G, Sidhu J, Rheault F, Sarubbo S, Descoteaux M, Fortin D Abstract Primary brain tumors are notoriously hard to resect surgically. Due to their infiltrative nature, finding the optimal resection boundary without damaging healthy tissue can be challenging. One potential tool to help make this decision is diffusion-weighted magnetic resonance imaging (dMRI) tractography. dMRI exploits the diffusion of water molecule along axons to generate a 3D modelization of the white matter bundles in the brain. This feature is particularly useful to visualize how a tumor affects its surrounding white matter and plan a surgical path. This paper reviews the different ways in which dMRI can be used to improve brain tumor resection, its benefits and also its limitations. We expose surgical tools that can be paired with dMRI to improve its impact on surgical outcome, such as loading the 3D tractography in the neuronavigation system and direct electrical stimulation to validate the position of the white matter bundles of interest. We also review articles validating dMRI findings using other anatomical investigation techniques, such as postmortem dissections, manganese-enhanced MRI, electrophysiological stimulations, and phantom studies with known ground truth. We will be discussing the areas of the brain where dMRI performs well and where the...
Source: Brain Structure and Function - Category: Neuroscience Authors: Tags: Brain Struct Funct Source Type: research

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AbstractHere, we report on a 28-year old male patient presenting with neck and shoulder pain, dysesthesia of all four limbs and hypesthesia of both hands, without motor deficits. Magnetic resonance imaging showed an intradural, intramedullary mass of the cervical spinal cord of 6.4  cm length and 1.7 cm diameter. The patient underwent surgical resection. Histological and immunohistochemical evaluation showed pleomorphic glial tumor cells, mitoses, calcifications, and atypical ganglioid cells compatible with the morphology of anaplastic ganglioglioma (WHO Grade III). Extensiv e molecular workup revealedH3F3A K27M,...
Source: Brain Tumor Pathology - Category: Neurology Source Type: research
We report a rare case of primary spinal intramedullary Ewing-like sarcoma harboringCIC-DUX4 translocation. A 23-year-old man presented with weakness in the extremities. Magnetic resonance imaging revealed a large intramedullary tumor spanning C3 –C5 with heterogeneous enhancement following gadolinium administration. Histologically, most of the tumor displayed dense myeloid proliferation composed of medium- to slightly small-sized primitive cells. Postoperatively, he received local adjuvant radiation therapy without tumor progression for 1 0 months. Target RNA sequencing analysis revealed theCIC-DUX4 fusion gene....
Source: Brain Tumor Pathology - Category: Neurology Source Type: research
AbstractAccurate and fully automatic brain tumor grading from volumetric 3D magnetic resonance imaging (MRI) is an essential procedure in the field of medical imaging analysis for full assistance of neuroradiology during clinical diagnosis. We propose, in this paper, an efficient and fully automatic deep multi-scale three-dimensional convolutional neural network (3D CNN) architecture for glioma brain tumor classification into low-grade gliomas (LGG) and high-grade gliomas (HGG) using the whole volumetric T1-Gado MRI sequence. Based on a 3D convolutional layer and a deep network, via small kernels, the proposed architecture...
Source: Journal of Digital Imaging - Category: Radiology Source Type: research
ConclusionsWe propose that pathogenicPTEN variants may predispose to medulloblastoma, and show that remission was reached with current treatment protocols. ThePTEN gene should be included in the genetic testing provided to patients who develop medulloblastoma at an early age. We recommend brain magnetic resonance imaging upon an unexpected acceleration of growth of head circumference for pediatric patients harboring pathogenic germlinePTEN variants.
Source: Molecular Genetics & Genomic Medicine - Category: Genetics & Stem Cells Authors: Tags: CLINICAL REPORT Source Type: research
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Source: Radiation Oncology - Category: Cancer & Oncology Authors: Tags: Research Source Type: research
Conclusion: PA accounts for 5% of all gliomas and is most common in children and young adults. It usually occurs in the cerebellum, the optic pathway, third ventricular region, etc. Pineocytomas are rare, accounting up to 1% of all intracranial tumors. Since tumors origin is different, there must be complex molecular events or mutations that can lead to cell rearrangements and generation of two histologically different tissues in the same tumor mass. The course of treatment options is different for PA and pineocytoma; therefore, the case of brain mass consisted out of two different tissues can be helpful when deciding abou...
Source: Surgical Neurology International - Category: Neurosurgery Tags: Surg Neurol Int Source Type: research
ederico D’Agata Magnetic Oxygen-Loaded Nanobubbles (MOLNBs), manufactured by adding Superparamagnetic Iron Oxide Nanoparticles (SPIONs) on the surface of polymeric nanobubbles, are investigated as theranostic carriers for delivering oxygen and chemotherapy to brain tumors. Physicochemical and cyto-toxicological properties and in vitro internalization by human brain microvascular endothelial cells as well as the motion of MOLNBs in a static magnetic field were investigated. MOLNBs are safe oxygen-loaded vectors able to overcome the brain membranes and drivable through the Central Nervous System (CNS) to deliver th...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research
In conclusion, the data demonstrated that the MRI features of patient‑derived xenograft glioma models in mice were different compared with those of the original patient tumors. Differential gene expression may underlie the differences noted in the MRI features between original tumors and corresponding xenografts. The results of the present study highlight the precautions that should be taken when extrapolating data from patient‑derived xenograft studies, and their applicability to humans. PMID: 32323818 [PubMed - as supplied by publisher]
Source: Oncology Reports - Category: Cancer & Oncology Tags: Oncol Rep Source Type: research
Publication date: Available online 17 April 2020Source: Journal of Clinical NeuroscienceAuthor(s): Isaac Josh Abecassis, Benjamin Cordy, Sharon Durfy, Jalal B. Andre, Michael R. Levitt, Richard G. Ellenbogen, Daniel L. Silbergeld, Andrew L. Ko
Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research
Source: International Journal of Neuroscience - Category: Neuroscience Authors: Source Type: research
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