astrocytic tumor (MONDO_0021636, a Monarch Disease Ontology identifier) is a glial tumor of the brain or spinal cord showing astrocytic differentiation. It includes the following clinicopathological entities: pilocytic astrocytoma, diffuse astrocytoma, anaplastic astrocytoma, pleomorphic xanthoastrocytoma, subependymal giant cell astrocytoma, and glioblastoma. Also known as: astrocytic neoplasm, astrocytoma of brain, astrocytoma, no ICD-O subtype, astroglioma.