1. A tumor of the brain or spinal cord that arises from astrocytes, a type of glial cell; the most common type of primary brain tumor in humans.
Usage: medical/oncology term; typically used in clinical and scientific contexts

Examples

• The patient was diagnosed with a low-grade astrocytoma after the MRI scan revealed an abnormal growth.
• Astrocytomas are classified into grades I through IV based on their aggressiveness and growth rate.
• Treatment options for astrocytoma may include surgery, radiation therapy, and chemotherapy.
• The neurologist explained that astrocytomas originate from star-shaped brain cells called astrocytes.
• High-grade astrocytomas tend to grow more rapidly than low-grade variants.