A doctor whose research into a rare type of brain tumour has led to better outcomes for babies diagnosed with the condition says it is a "massive step forward" in cancer treatment.
Dr Matt Clarke, said his work with the Institute for Cancer Research found that a specific group of tumours in infants under the age of one were treatable with existing medicines.
This had led to "many different success stories", and his four-year study has also contributed to a new chapter being published in the World Health Organization's classification of brain tumours.
Doctors no longer have to rely on chemotherapy and radiotherapy which can cause lasting damage to infants.