[Objectives and organization for the long-term follow-up after childhood cancer].

Increased survival of patients with childhood cancer has resulted in a growing population of survivors. In France approximately 50,000 alive people have been treated before 20 years old and, as survivors, are at risk for health problems due to disease or cancer therapy (surgery, chemotherapy, radiotherapy). Complications such as cardiovascular or cerebrovascular disease (after radiotherapy or chemotherapy), neurocognitive deficiency, endocrine disorders (hypopituitary axis, or thyroid dysfunction), gonadal function, and second malignancy can be life-threatening and seriously affect quality of life. Upon discharge former patients should be given 'passport', containing a summary of their medical history, treatment (surgery, chemotherapy cumulative doses, characteristics of radiotherapy and organs involved), methods used to preserve fertility, and complications during treatment. Treatments can then be linked to individualized recommendations for follow-up care. The risk of developing long-term complications increases with time and can be aggravated by age-related comorbidity and environmental factors (tobacco, alcohol, obesity). Many regions and treatment centres in France have in place organised long-term follow-up procedures.