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Oligoastrocytoma is a brain tumor that forms when two types of cells in the brain, called oligodendrocytes and astrocytes, rapidly increase in number to form a mass. These brain cells are known as glial cells, which normally protect and support nerve cells in the brain. Because an oligoastrocytoma is made up of a combination of two cell types, it is known as a mixed glioma. Oligoastrocytomas usually occur in a part of the brain called the cerebrum and are diagnosed in adults between the ages of 30 and 50. The exact cause of this condition is unknown.
Source: GARD Last updated on 05-01-20
Currently, genetic testing is not automatically indicated for children of an individual who has been diagnosed with an oligoastrocytoma. The exact cause of oligoastrocytomas is unknown, and no single inherited risk factor has been shown to increase the chance of developing this type of tumor.
In rare cases, a brain tumor may be associated with an inherited genetic risk factor, but this is more likely if there is a family history of multiple cancers in close relatives. To assess the chance that the cancers in a family are caused by an inherited genetic risk factor, a genetics professional can take a full family history and determine if any genetic testing is appropriate. If possible, it is most useful for an individual with a personal history of cancer to be tested first.
Genetics clinics are a source of information for individuals and families regarding genetic conditions, treatment, inheritance, and genetic risks to other family members. More information about genetic consultations is available from Genetics Home Reference at http://ghr.nlm.nih.gov/handbook/consult. To find a genetics clinic, we recommend that a primary healthcare provider offer a referral.
The following online resources can help locate a local genetics professional:
Last updated on 05-01-20
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