A brain tumour is a mass, or lump in the brain which is caused when brain cells divide and grow in an uncontrolled way.
But what are the signs of the serious condition and how easy are they to spot? Here’s what we know and what to look out for.
What is a brain tumour?
A brain tumour is a growth of abnormal cells that grow on the organ and multiply and spread in an uncontrollable way.
The growths can be benign, non-cancerous, which grow slowly and if treated are unlikely to reappear.
However, cancerous brain tumours are more serious and some can start in the brain or spread there from cancer elsewhere in the body.
Brain tumours are also graded on their seriousness, with grade one and two tumours being seen as low risk.
While grade three and four tumours are seen as high risk and likely to return after treatment.
Would a brain tumour show in a blood test?
Blood tests can also help in assessing some types of brain tumours, according to neurologist Dr Peter Pressman.
Some brain tumours, such as pituitary tumours, can produce hormones that are detected in the blood, he explained in an essay on very well health.
If you have a pituitary tumours, you may have an abnormal concentration of hormones such as growth hormone or thyrotropin (a hormone that stimulates the thyroid gland) in your blood.
What are the symptoms of a brain tumour?
According to the NHS, the symptoms of a brain tumour depend on its severity and which part of the brain is affected.
However, there are common signs that people can look out for if they are worried.
These include severe, non-stop headaches, seizures as well as nausea, vomiting and drowsiness.
Other signs can include vision or speech problems, paralysis and even changes to a person’s behaviour such as having difficulty remembering things.
These symptoms can appear suddenly or develop slowly over time.
The brain tumour charity has more information on symptoms on their website.