A brain tumour is an abnormal growth of cells within the brain, which can be benign (non-cancerous) or malignant (cancerous).
Benign brain tumours do not contain cancer cells. Usually the tumour can be removed and it seldom grows back. The benign tumour cells do not invade tissues around them or spread to other parts of the body. However, a benign brain tumour can press on sensitive areas of the brain and cause serious health problems. The tumour can be life threatening.
Malignant brain tumours contain cancer cells and are generally more serious than benign brain tumour. These tumours are often more life threatening. The malignant tumour cells are likely to grow rapidly and invade the surrounding brain tissues.
The exact cause of brain tumour remains unknown.