Cancer: Routine test saves 'fit as a flea' pensioner after doctors find 'giant tumour'
The Briton said she would have died in 18 months had she not done the test
The Briton said she would have died in 18 months had she not done the test
Fifteen NHS hospitals will offer the treatment over the next year
Chemotherapy can fail when a specific group of immune cells builds protective shields around tumours