A brain tumour is a growth of abnormal cells in the brain. The most common type of brain tumour is glioblastoma, a highly malignant tumour of which over 4,700 cases are diagnosed annually in the UK.
Glioblastoma tumours are the most common cancerous brain tumours that occur in adults. They grow quickly and are like to spread to other parts of the brain. The cause of most brain tumours are unknown, and glioblastoma is no exception. Research is being carried out to discover how and why brain tumours appear, but government funding for this research is chronically low.
Glioblastoma tumours are diffuse, meaning that they have threadlike elements that spread into other parts of the brain making it difficult to remove the tumour entirely. Other factors can also affect the success rate of removing tumours, such as whether the tumour has grown near important areas of the brain.