Oligodendrogliomas

Part of speech: noun

Definitions

1. A type of brain tumor arising from oligodendrocytes that produce myelin; typically found in the cerebral hemisphere; associated with various neurological symptoms depending on its location and size
2. A rare form of neoplasm originating in the supportive cells of the nervous system that affects primarily the brain's white matter; it may present with seizures or cognitive decline; diagnosis often requires imaging and biopsy
3. A specific category of glioma that develops from oligodendrocyte cells, important for neural insulation; often characterized by slow growth and variable prognosis; treatment options include surgery, chemotherapy, and radiation

Etymology: Oligodendrogliomas are tumors that arise from oligodendrocytes, the cells that wrap nerve fibers in white matter with their insulating myelin sheaths. The word is a plural, so it names more than one such tumor, and the singular "oligodendroglioma" is the form that names the condition itself. The term is built from two parts. "Oligo-" comes from the Greek "oligos", meaning "few" or "small", and in this context refers to the relatively small number of branches these cells send out compared with other brain cells. The second part, "dendroglioma", combines "dendro-", from the Greek "dendron" meaning "tree", with "glioma", the general term for tumors of glial cells, the supportive tissue of the nervous system. Joined together, the name describes a tumor of cells that have few, tree-like branches.