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A ganglion is a non-cancerous cyst filled with a thick, jelly-like fluid. Ganglions can develop on or beneath the surface of the skin and usually occur between the ages of 20 and 40. Most ganglions develop on the hand or wrist.
Ganglion-group of neuron cell bodies that lie peripheral to the central nervous system in vertebrates. Neuroglia-cells in the central nervous system that help to support, protect and maintain the neurons. Microglia-small neuroglial cells of mesodermal origin, some of which are phagocytic. Oligodendrocytes-neuroglial cells of ectodermal origin that myelinate axons in the central nervous system and forms the white matter of the central nervous system (unmyelinated axons are grey matter. 2  Astrocytes-star-shaped nutritive and supportive glia cells of the central nervous system.