Well there are two types of brain tumors: benign (tumor takes space in the brain and presses against it) or malignant (tumor that spreads and destroys surrounding cells). Like most tumors, the cells in the brain would be mutated and there cell cycle disturbed. These anormal cells will multiply making copies of themselves (by mitosis), therefore they will soon start to take some space. You could have meningioma (tumor of the cells of the meninges), gliomas (most common and serious tumor that spreads), astrocytoma (tumor of the astrocytes in the brain), etc... The beginning of the tumor can really be caused by anything environmental (such as what you eat) or even genetics (any family member had it), but we do not know more than that. For example, in skin cancer, we know one factor can be the sun exposure (because of UV rays which will mutate the skin cells). A good way to prevent brain tumors will be to take anti-oxydants in your died because free radicals (wastes of your brain) can be dangerous to the brain cells.
Not usually.
1> the peronality of a person changes
The cause of primary brain tumors is unknown, but people who work with rubber and certain chemicals have a greater-than-average risk of developing them
Yes, it is possible. It can even occur in children and infants. Brain tumors originally have been known to develop in teens from taking drugs, alcohol, or other medical related causes. Many people can get brain tumors. Anyone can, you can even get them when you are born. But brain tumors are very rare and not that many people can get it.
It is possible. Studies have shown that workers who are regularly exposed to radiation are much more likely to develop brain tumors later in life. However this is not the only factor and it is not really known for certain what causes most brain tumors.
The most common primary brain tumors include gliomas such as astrocytomas, ependymomas, and oligodendrogliomas
Malignant brain tumors do not have distinct borders
Metastatic SOL's or tumors found in the brain are same as brain cancer. Metastatic tumors are one of the most common type of tumors found in the brain.
Gliomas are the most prevalent primary brain tumors
Benign brain tumors are composed of harmless cells
Men and caucasians have a higher risk of developing brain tumors
yes, metastatic brain tumors can be deadly if not treated properly.