tumour

Doctors feared if they waited until the baby was born to treat Lucy's tumour, the cancer would likely spread and pose a risk to her life.

Knowles also opens up in her book about being diagnosed with Stage 1 breast cancer in her left breast, after doctors discovered two tumours.

During a tearful interview last month, she said the craniotomy - which involved part of her skull being removed to take out the tumour - was "the hardest thing" she had been through.

Some 3,000 women a year could benefit from capivasertib after a clinical trial showed it can slow progression of the disease, and shrink tumours in a quarter of people.

His younger brother was then invited to take part in the study and also discovered he had an aggressive tumour.