This type of tumor can occur in most areas of the brain (especially the cerebrum), but does not spread to other parts of the body. It is one of the most common brain tumors and affects people of all ages, with a prevalence among middle-age males.
There are three different types of astrocytomas: low-grade, anaplastic and glioblastoma (the latter two also called high-grade). Classification is critical to treatment and prognosis. Low-grade astrocytomas develop more often in children and grow slowly, while high-grade astrocytomas are diagnosed frequently in adults and are aggressive.