MedicalTerminology DB

Meaning of grade IV astrocytoma: A fast-growing type of central nervous system tumor that forms from glial (supportive) tissue of the brain and spinal cord and has cells that look very different from normal cells.

Definition of grade IV astrocytoma

A fast-growing type of central nervous system tumor that forms from glial (supportive) tissue of the brain and spinal cord and has cells that look very different from normal cells. Grade IV astrocytoma usually occurs in adults and affects the brain more often than the spinal cord. Also called GBM, glioblastoma, and glioblastoma multiforme.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.