The treatment of childhood cancer has been increasingly successful over the past 30 years. Most paediatric cancers are now curable with multiagent chemotherapy in combination with surgery and radiotherapy. The overall survival five years after diagnosis is now 70% for all paediatric malignancies. The incidence is low (1200-1300 children affected each year in Britain), but with the sustained improvement in survival the number of long term survivors is increasing—about 850 additional survivors of childhood cancer each year. With this improved survival, it is important to increase our knowledge of any long term costs in the form of physical and psychosocial adverse health outcomes.

This review looks at the evidence relating to long term clinical follow up after childhood cancer and considers ways to develop such follow up for the future. An awareness of the possible long term complications is important not only for optimising health care for the current survivors but also for modifying future treatment protocols to avoid therapies that are associated with unacceptable morbidity or mortality.

We have summarised the evidence on selected long term complications; this evidence is inevitably based on retrospective studies. In the final section we discuss the development of a strategy for the clinical follow up of long term survivors.