Ganglioglioma
Encyclopedia
Ganglioglioma is a tumour that arises from ganglion cell
s in the central nervous system
.
The term "gangliocytoma" is sometimes equated with ganglioglioma. However, it is also sometimes equated with ganglioneuroma
. In this context, the glial nature of the tumor is de-emphasized. The term "gangliocytoma" is sometimes used to imply that the tumor is entirely neuronal.
While Gangliogliomas are most well known as occurring in the temporal lobe
of the brain
, they can occur anywhere in the brain, or in the spinal cord
. Gangliogliomas in the brain are often associated with seizure
s.
They are the second most common cause of spinal cord tumors in children.
Gangliogliomas are mature ganglion cells clustered with neoplastic glial cell
s.
Ganglion cell
A retinal ganglion cell is a type of neuron located near the inner surface of the retina of the eye. It receives visual information from photoreceptors via two intermediate neuron types: bipolar cells and amacrine cells...
s in the central nervous system
Central nervous system
The central nervous system is the part of the nervous system that integrates the information that it receives from, and coordinates the activity of, all parts of the bodies of bilaterian animals—that is, all multicellular animals except sponges and radially symmetric animals such as jellyfish...
.
The term "gangliocytoma" is sometimes equated with ganglioglioma. However, it is also sometimes equated with ganglioneuroma
Ganglioneuroma
Ganglioneuroma is a tumor of the sympathetic nerve fibers arising from neural crest cells.For example, it can be found also in the eye , or in the medulla of adrenal glands. Some may be a progressive form of a neuroblastoma....
. In this context, the glial nature of the tumor is de-emphasized. The term "gangliocytoma" is sometimes used to imply that the tumor is entirely neuronal.
While Gangliogliomas are most well known as occurring in the temporal lobe
Temporal lobe
The temporal lobe is a region of the cerebral cortex that is located beneath the Sylvian fissure on both cerebral hemispheres of the mammalian brain....
of the brain
Brain
The brain is the center of the nervous system in all vertebrate and most invertebrate animals—only a few primitive invertebrates such as sponges, jellyfish, sea squirts and starfishes do not have one. It is located in the head, usually close to primary sensory apparatus such as vision, hearing,...
, they can occur anywhere in the brain, or in the spinal cord
Spinal cord
The spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the brain . The brain and spinal cord together make up the central nervous system...
. Gangliogliomas in the brain are often associated with seizure
Seizure
An epileptic seizure, occasionally referred to as a fit, is defined as a transient symptom of "abnormal excessive or synchronous neuronal activity in the brain". The outward effect can be as dramatic as a wild thrashing movement or as mild as a brief loss of awareness...
s.
They are the second most common cause of spinal cord tumors in children.
Gangliogliomas are mature ganglion cells clustered with neoplastic glial cell
Glial cell
Glial cells, sometimes called neuroglia or simply glia , are non-neuronal cells that maintain homeostasis, form myelin, and provide support and protection for neurons in the brain, and for neurons in other parts of the nervous system such as in the autonomous nervous system...
s.
External links
- Ganglioglioma Images MedPix Medical Image Database
- Gangliocytoma Images MedPix Medical Image Database
- Lhermitte-Duclos Images MedPix Medical Image Database