Brain Cancer

Brain cancer is a malignant tumor that grows in the brain cells, both derived from cells of the brain itself (primary brain cancer) or from other organs that spread to the brain (secondary or metastatic brain cancer). Some types of brain cancer known include glioma, meningioma, pituitary adenoma, vestibular schwannoma, and medulloblastoma.
Unlike other types of cancer, brain cancer rarely spreads to other tissues so that the classification is based only on how fast the growth of cancer cells. Stage I means the cancer cells still appear normal and slow growth, while stage IV means the cancer cells look abnormal and grow very fast.
National Cancer Institute estimates that each year there are 22,000 new cases of brain cancer worldwide. Death rate is quite high, which is about 13,000 per year.
Causes of Brain Cancer
Secondary brain cancer is caused by the growth of cancer cells in other tissues are spread to the brain. Most types of cancer that spread to the brain include breast cancer, colon cancer, kidney cancer, lung cancer and skin cancer.
Meanwhile, primary brain cancer is caused by structural changes Nucleid Deoxyribo Acid (DNA) so that the growth is uncontrolled. Trigger changes in DNA are not known for sure, but suspected that many factors affect, among others, radiation, cigarette smoke and certain viral infections.