Gliomatosis Cerebri

**Semantic type:** Neoplastic Process

**Definition:** A diffuse glial tumor which infiltrates the brain extensively, involving more than two lobes. It is frequently bilateral and often extends to the infratentorial structures, even to the spinal cord. It is probably of astrocytic origin, although GFAP expression may be scant or absent. (Adapted from WHO.)

**Synonyms:** - Astrocytosis cerebri - Gliomatosis - Gliomatosis cerebri