Astrocytoma epidemiology and demographics
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ammu Susheela, M.D. [2]
Overview
In year 2012 the number of new cases of brain and other nervous system cancer was 6.4 per 100,000 men and women per year in United States. The number of deaths was 4.3 per 100,000 men and women per year based on 2008-2012 deaths. Patients of all age groups may develop astrocytoma. Pilocytic astrocytoma accounting for between 0.6-5.1% of all intracranial neoplasms.
Epidemiology and Demographics
- Pilocytic astrocytoma accounting for between 0.6-5.1% of all intracranial neoplasms (1.7-7% of all glial tumors) are the most common primary brain tumor of childhood, accounting for 70-85% of all cerebellar astrocytomas.[1]
- Less than 10% of Glioblastoma Multiforme form more slowly following degeneration of low-grade astrocytoma or anaplastic astrocytoma.
Prevalence
- In 2012, there were an estimated 148,818 people living with brain and other nervous system cancer in the United States.
Incidence
- The incidence of astrocytoma is 0.23 per 100,000 and the number of new cases is 700 per year.
- Diffuse astrocytoma has an incidence of 0.1 per 100,000, with 1500 to 1800 new cases per year in North America.
- Anaplastic astrocytoma has an incidence of 0.49 per 100,000 per year.
- Glioblastoma has an incidence of 5 per 100,000 per year.
Age
- People can develop astrocytomas at any age.
- The low-grade type is more often found in children or young adults, while the high-grade type are more prevalent in adults.
- Subependymal giant cell tumors are a well known manifestation of TS, affecting 5-15% of patients with the condition. They are principally diagnosed in patients under 20 years of age, but are occasionally found in older people[2].
- Anaplastic astrocytomas occur in adulthood with peak incidence between 40 and 50 years of age, which is older than low grade astrocytomas and younger than glioblastoma.[3]
- Pilocytic astrocytomas are tumors of young people, with 75% occurring in the first two decades of life, typically late in the first decade (9-10 years). The mean age of presentation is 17 years[2]
- The median age of diffuse astrocytoma at diagnosis is 35 years, with a biphasic age distribution at 6 to 12 years and 26 to 46 years.
- Pleomorphic xanthoastrocytoma has a median age at presentation of 22 years.
- Mean age at diagnosis of Anaplastic astrocytoma of 40 years.
- The peak incidence of glioblastoma is at ages 65 to 74 years
Mortality
- The number of deaths was 4.3 per 100,000 men and women per year based on 2008-2012 deaths.
Gender
- Pilocytic astrocytoma is more common in men, who account for 62% of all cases.
- The male-to-female ratio of diffuse astrocytoma is 1.5:1.
- The male-to-female ratio of anaplastic astrocytoma is 1.8:1.
References
- ↑ "Surveillance, Epidemiology, and End Results Program".
- ↑ 2.0 2.1 "Subependymal giant cell astrocytoma [Dr Bruno Di Muzio and Dr Jeremy Jones]".
- ↑ Atlas, Scott (2009). Magnetic resonance imaging of the brain and spine. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. ISBN 078176985X.