Why having high blood pressure can quadruple the risk of developing a brain tumour

People with highest blood pressure twice as likely to develop brain tumour

Risk increases fourfold for those with meningioma and high blood pressure 

People with high blood pressure may be at increased risk of developing brain tumours, according to a new study.
The overall risk doubles for people with the highest blood pressure levels, compared to those with the lowest.
But it increases up to fourfold for some people diagnosed with meningioma who had high blood pressure, claim researchers from Austria, Norway and Sweden.

At risk: People with the highest blood pressure levels are twice as likely to develop a brain tumour, according to researchers

The scientists took the blood pressure measurements of 580,000 people and then waited to see if they went on to develop a benign or malignant brain tumour over the next ten years.
Around one-third of those taking part were diagnosed with hypertension, the medical name for high blood pressure.
A total of 1,312 people were diagnosed with a brain tumour during the follow-up period, including one-third with high-grade tumours which are more likely to spread.
The findings show that the 20 per cent of participants with the highest blood pressure readings were twice as likely to be diagnosed with meningioma or malignant glioma, types of brain tumour accounting for most cases.