5) They arise from the
ependymal glial cells and typically present as intradural/extra medullary lesions involving the lumbar and sacral spinal canal.
The cerebral aqueduct, an anatomically restricted access of the ventricular system, is lined with
ependymal cells expressing AQP4 and inflammatory sequelae of IgG binding to AQP4 and it is thought that this is the region where scarring, occlusion, stenosis, or reduced compliance of the aqueductal channel leading to obstruction occurs [19].
Ependymal cells that line these ventricles have hair-like extensions that are thought to promote the normal flow of fluid.
Scientists have struggled with the mystery of why stem cells can't generate neurons in a lab dish, but Duke University Medical Center researchers believe that a network of cells surrounding stem cells in the brain, called
ependymal cells, is what allows stem cells to continue making new neurons.
The scientists found that neighboring "epitheliallike"
ependymal cells--not stem cells themselves--maintain a special structure that keeps neural stem cells "neurogenic," able to make new neurons.
The scientists found that neighbouring "epithelial-like"
ependymal cells - not stem cells themselves - maintain a special structure that keeps neural stem cells "neurogenic," able to make new neurons.
Often the condition is indistinguishable from PCNSL, and the lack of
ependymal spread and additional imaging with single photon emission computed tomography (SPECT) and positron emission tomography (PET) can be helpful.
Prognostic factors in children with medulloblastoma [8] Factor Favorable Unfavorable Extent of Nondisseminated Disseminated (especially disease brainstem infiltration) Size of primary Less than 3 cm More than 3 cm tumor after (completely surgery resected) Histologic Undifferentiated Foci of glial,
ependymal or features neuronal differentiation Age (years) [greater than < 4 or equal to] 4
The ventricles were lined by
ependymal cells that were high cuboidal to columnar in shape.
Glial tumors are the most common type of primary brain tumor with the majority being malignant, and they are derived from a variety of cells including astrocytes, oligodendrocytes, and
ependymal cells.
Astrocytes,
ependymal, and oligodendroglial cells are all examples of glial cells that compose the supportive tissue of the brain.
Endoscopic resection of intraventricular
ependymal cyst presenting with psychosis.
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