Tumours are abnormal growths in the body. They can be either benign or malignant (cancerous).
Benign tumours are not cancerous and only grow in one place. They can't spread or invade other parts of the body, but can be dangerous if they press on vital organs, such as the brain. Treatment for benign tumours usually involves surgery. Once treated, benign tumours don't usually grow back.
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Last reviewed: July 2016