A new targeted treatment for ovarian cancer has shown “very promising” results in women in the advanced stages of the disease.
It shrank tumours in about half of women who took part in a small trial.
Researchers had only been testing the drug to see if it was safe for humans to take, but found it had an almost instant clinical effect.
It is hoped the drug could help women who have stopped responding to all other currently available treatments.
So far, it has only been tested in 15 women, and the researchers say it may not be safe to take for more than a few months.