Brain tumours are categorised by their location as there are many different types. The cancer prognosis depends on where the cancer is and how far it has spread. These types of cancers are hard to screen for. Metastatic brain cancer has the lowest of cancer survival rates among brain tumors.
Common brain tumours
Gliomas Gliomas are the most common form of primary brain tumours. They start in the supportive tissue of the brain, the glial cells. A few forms of this type of brain tumor include astrocytomas, brain stem gliomas, optic nerve gliomas, ependymomas, and oligodendrogliomas. Metastatic tumours Metastatic tumors are the most common form of brain tumours in adults. They start elsewhere in the body, travel through the bloodstream, and end up in the brain. These commonly spread to the cerebellum or the cerebral hemisphere. Typically, they are in several different locations. It is an aggressive cancer, and may recur. Cancers of the breast, colon, and lung have the highest chance of travelling to the brain.
Typically non-cancerous tumours
These are typically benign tumours and are not cancerous. They start in the outer covering of the brain, known as the dura or meninges. Meningiomas are 15% of all brain tumours that are diagnosed. They are common in those aged 40-50 years and are slow growing. Usually, they can be totally removed from the brain through surgery, but may recur. These types are most likely to be found in the cerebral hemisphere.
Pituitary tumours Pituitary tumours are those found in the base of the brain, in the pituitary gland. A tumour located there may affect its function and overproduce hormones. These tumours can give a man impotence or a woman irregular periods. It may be close to the eye and give vision problems. These tumours which are usually non-cancerous or benign, are treated with medication or surgery, and usually do not recur if total removal is done. Schwannomas These are very much like meningiomas and are benign. They deal with the nerves, starting in the supporting cells of the brain’s nerves. They are hard to deal with via surgery because of their location. So, radiation is the primary form of treatment. They also may be dealt with using a combination of radiation and surgery.