This is a condition in which cells grow abnormally in or near the brain. Not all tumors are cancerous (Malignant), and some are benign (Benign). The main causes are:
Genetic factors and heredity: A very small percentage of brain tumors are passed down through families. Certain genetic conditions, such as Li-Fraumeni syndrome and neurofibromatosis, increase the risk of developing a tumor.
Exposure to radiation: Exposure to strong ionizing radiation to the head can cause a brain tumor. This risk also applies to people who have previously received radiation treatment to the head for another disease. However, it has not yet been proven that ordinary X-rays or mobile tower radiation can cause tumors.
Exposure to chemicals: Some studies suggest that people who have long-term exposure to toxic chemicals, such as vinyl chloride, used in factories, may have a slight risk of developing tumors.
Age: Although brain tumors can occur at any age, the risk increases with age. They are most common in children and the elderly.
Spread of other cancers: Brain tumors often occur when cancer that starts in other parts of the body (such as the lungs, breast, or kidneys) spreads to the brain through the bloodstream. This is called a secondary brain tumor.