Results 41 to 50 of about 87,399 (317)

The cell of origin dictates the temporal course of neurofibromatosis-1 (Nf1) low-grade glioma formation. [PDF]

open access: yes, 2017
Low-grade gliomas are one of the most common brain tumors in children, where they frequently form within the optic pathway (optic pathway gliomas; OPGs).
Castillon, Guillaume A   +9 more
core   +3 more sources

Astrocytomas of the Nose

open access: yesArchives of Otolaryngology - Head and Neck Surgery, 1956
To the generic group of the gliomas belong the tumors designated astrocytomas, and, according to Ewing, * these neoplasias are, in general, cerebral or cerebellar tumors of slow growth, composed principally of adult glial cells. The astrocytomas have a special structure and are relatively acellular and scarcely vascularized.
openaire   +3 more sources

Pilocytic astrocytomas [PDF]

open access: yes, 2016
Pilocytic astrocytoma (PA) is the most common pediatric brain tumor in children. PAs are a distinct histologic and biologic subset of glioma that have a slow growth rate and may even spontaneously regress. These tumors tend to arise in the cerebellum and chiasmatic/hypothalamic region, but can also occur in other regions of the central nervous system ...
Miriam, Bornhorst   +2 more
openaire   +2 more sources

Expression of Ki 67 and P53 immunohistochemical markers in central nervous system astrocytoma

open access: yesمجلة كلية الطب, 2015
Background: Astrocytic tumors are the most common primary tumors of the central nervous system. Several grading systems are used to grade astrocytomas.
Mahmood Sh. Mahmood   +1 more
doaj   +1 more source

Validation of Soft Classification Models using Partial Class Memberships: An Extended Concept of Sensitivity & Co. applied to the Grading of Astrocytoma Tissues

open access: yes, 2013
We use partial class memberships in soft classification to model uncertain labelling and mixtures of classes. Partial class memberships are not restricted to predictions, but may also occur in reference labels (ground truth, gold standard diagnosis) for ...
Beleites, Claudia   +2 more
core   +1 more source

Hypoxia helps glioma to fight therapy [PDF]

open access: yes, 2009
Despite major improvements in the surgical management the prognosis for patients bearing malignant gliomas is still dismal. Malignant gliomas are notoriously resistant to treatment and the survival time of patients is between 3-8 years for low-grade and
Amberger-Murphy, Verena
core   +1 more source

Manifold Learning in MR spectroscopy using nonlinear dimensionality reduction and unsupervised clustering [PDF]

open access: yes, 2014
Purpose To investigate whether nonlinear dimensionality reduction improves unsupervised classification of 1H MRS brain tumor data compared with a linear method. Methods In vivo single-voxel 1H magnetic resonance spectroscopy (55 patients) and 1H magnetic
Barrick, TR   +3 more
core   +1 more source

Zika virus promotes CCN1 expression via the CaMKIIα-CREB pathway in astrocytes. [PDF]

open access: yes, 2020
Zika virus (ZIKV) infection in the human central nervous system (CNS) causes Guillain-Barre syndrome, cerebellum deformity, and other diseases. Astrocytes are immune response cells in the CNS and an important component of the blood-brain barrier ...
Hu, Q   +12 more
core   +1 more source

Pilomyxoid astrocytoma

open access: yesIndian Journal of Pathology and Microbiology, 2010
Pilomyxoid astrocytoma (PMA) is a recently described brain tumor. PMA shares similar features with pilocytic astrocytoma (PA), the most common central nervous system (CNS) tumor in the pediatric population, yet displays subtle histologic differences.
Azad Sheenam   +6 more
openaire   +3 more sources

Intraorbital ancient pilocytic astrocytoma of the optic nerve in neurofibromatosis type 1 patient presenting with sudden ocular pain

open access: yesSAGE Open Medical Case Reports, 2018
Optic nerve pilocytic astrocytoma is an uncommon but well-known entity; however, intraorbital ancient pilocytic astrocytoma of the optic nerve is extremely rarely reported.
Haesu Lee Motoyama   +4 more
doaj   +1 more source

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