Explained in plain English

What is a brain tumour?

A brain tumour is a growth of abnormal cells in the brain. They can be benign (non-cancerous) or malignant (cancerous). Symptoms like headaches and sickness, as Phoebe experienced, can occur when the tumour puts pressure on parts of the brain. Early detection, often through tests like the one Phoebe had, is crucial for successful treatment.