Scientists believe the technique will allow them to develop extremely personalised cancer treatments, that will substantially increase life expectancy.
Patients will soon have their tumour's DNA, its genetic code, sequenced, enabling doctors to ensure they give exactly the right drugs to keep the disease at bay, 'The Telegraph' reported.
Doctors hope it will be an important step towards transforming some types of cancer into a chronic rather than fatal disease.
The technique could enable terminally ill patients, who can currently expect to live only months, to carry on for a decade or more in relatively good health, according to specialists at the Institute of Cancer Research in London.
"We should be aspiring to cure cancer, but for people with advanced disease, it will be a question of managing them better so they survive for much longer