Colloid cysts are often asymptomatic, with symptoms typically appearing once the tumor grows large enough to disrupt normal brain function.

In an Instagram post this morning, the TV presenter, 57, said she had a 'very rare' colloid cyst, which affects just three in a million people.

Colloid cysts affect around three people per million and according to the NHS, non-cancerous brain tumours are more common in people over the age of 50. What is a colloid cyst?

Symptoms of colloid cysts can include headaches that are most severe in the morning upon waking, nausea, vomiting and blurry vision, according to Columbia Neurosurgery.

The benign tumour is known as a colloid cyst, which was discovered when the 57-year-old presenter was offered a health check-up as part of her menopause advocacy work.

Davina McCall is undergoing surgery after revealing she has a 14mm benign brain tumour, called a colloid cyst. The colloid cyst was discovered during a scan Davina received in exchange for giving ...

Davina McCall has said she is to undergo brain surgery, after being diagnosed with a “very rare” tumour. The benign tumour is known as a colloid cyst, which was discovered when the 57-year-old ...

Davina McCall is undergoing surgery after revealing she has a 14mm benign brain tumour, called a colloid cyst. The colloid cyst was discovered during a scan Davina received in exchange for giving ...

Davina McCall has said she is to undergo brain surgery, after being diagnosed with a “very rare” tumour. The benign tumour is known as a colloid cyst, which was discovered when the 57-year-old ...

The benign tumour is known as a colloid cyst, which was discovered when the 57-year-old presenter was offered a health check-up as part of her menopause advocacy work. McCall described it as a ...