Glioma

**Semantic type:** Neoplastic Process

**Definition:** A benign or malignant brain and spinal cord tumor that arises from glial cells (astrocytes, oligodendrocytes, ependymal cells). Tumors that arise from astrocytes are called astrocytic tumors or astrocytomas. Tumors that arise from oligodendrocytes are called oligodendroglial tumors. Tumors that arise from ependymal cells are called ependymomas.

**Synonyms:** - Glial Neoplasm - Glial Tumor - Glioma, NOS - Neoplasm of Neuroglia - Neoplasm of the Neuroglia - Neuroglial Neoplasm - Neuroglial Tumor - Neuroglial Tumor - Tumor of Neuroglia - Tumor of the Neuroglia - glial tumor - glioma