Gliomas are a type of brain tumor that arise from the glial cells in the brain and spinal cord. Glial cells provide support and insulation to the neurons in the brain and help maintain the structure and function of the nervous system. Gliomas can be classified as either low-grade or high-grade, depending on their aggressiveness and how fast they grow.

Low-grade gliomas are typically slow-growing and are less likely to spread to other parts of the brain or spinal cord. However, they can still cause significant damage if they grow in critical areas of the brain.

High-grade gliomas, also known as malignant gliomas, are more aggressive and can quickly spread to other parts of the brain or spinal cord. These tumors are more difficult to treat and have a poorer prognosis compared to low-grade gliomas.

Symptoms of gliomas can include headaches, seizures, memory loss, and changes in personality or behavior. Treatment for gliomas may involve surgery, radiation therapy, chemotherapy, or a combination of these approaches. The specific treatment plan will depend on the type, size, location, and grade of the tumor, as well as the overall health of the patient.