New Delhi, Feb. 14 -- Childhood cancers can be extremely challenging considering they are difficult to screen and diagnose and the reasons are many a time unknown. As per WHO, some chronic infections, such as HIV, Epstein-Barr virus and malaria, are among the risk factors for childhood cancer. Every year, around 4 lakh children and adolescents up to the age of 19 develop cancer. The most common types of childhood cancers include leukaemia, brain cancers, lymphomas and solid tumours, such as neuroblastoma and Wilms tumour. Cancer is the leading cause of mortality in all age groups including children. Telltale signs of cancer in children should not be ignored. If your child is losing weight rapidly without any reason or is having recurrent is...