Paediatric leukaemia constitutes a major chunk of childhood cancers in the state. According to experts, the incidence of paediatric leukaemia is 75 to 80 per cent of the malignancies in the section. Asked about the exact number of paediatric cancer patients in the state, P. Gangadharan, Statistician, Cancer Registry, Amrita Institute of Medical Sciences, Kochi, said, “The exact number in the state cannot be pinpointed because the registry of a hospital has only the cases that were registered in that particular hospital,” he said. Experts could not pinpoint exact reasons for the malignancy.