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Depending on the patient, radiation or chemotherapy after surgery is an option. Individuals with grade 2 astrocytoma have a 5-year survival rate of about 34% without treatment and about 70% with radiation therapy. [6] The median survival time is 4 years. [6] III Anaplastic astrocytoma; Consist of anaplastic astrocytomas.
Anaplastic astrocytoma is a rare WHO grade III type of astrocytoma, which is a type of cancer of the brain. In the United States, the annual incidence rate for anaplastic astrocytoma is 0.44 per 100,000 people.
The WHO grade has four categories of tumors: Grade 1 tumors are slow-growing, nonmalignant, and associated with long-term survival. Grade 2 tumors are relatively slow-growing but sometimes recur as higher grade tumors. They can be nonmalignant or malignant. Grade 3 tumors are malignant and often recur as higher grade tumors.
However, the tumor may recur if the resection is incomplete, in which case further surgery or the use of other therapies may be required. Standard radiotherapy for fibrillary astrocytoma requires 10 to 30 sessions, depending on the subtype of the tumor, and may sometimes be performed after surgical resection to improve outcomes and survival rates.
The age-adjusted incidence rate is 6.4 per 100,000 per year, and the death rate is 4.3 per 100,000 per year. The lifetime risk of developing brain cancer for someone born today is 0.60%. Only around a third of those diagnosed with brain cancer survive for five years after diagnosis.
Among people with PXA who were able to have their tumors completely resected during surgery, there is a long-term survival rate of 90%. After incomplete resection, the long-term survival rate is higher than 50%. Morbidity is determined by the type and evolution of the tumor, with high-graded anaplastic tumors causing more fatalities. [citation ...
[3] [2] Grades III and grade IV are considered malignant astrocytomas. Anaplastic astrocytomas are considered by the WHO to be a grade III astrocytoma and Glioblastoma is a grade IV both are referred to high-grade glial tumors. [2] Ependymal tumors are another glial tumor type of the central nervous system.
Even after surgery, an oligoastrocytoma will often recur. The treatment for a recurring brain tumor may include surgical resection, chemotherapy and radiation therapy. Survival time of this brain tumor varies; younger age and low-grade initial diagnosis are factors in improved survival time.