In Finland, the incidence of cancer in adolescents aged 15-19 years is 23 per 100,000. 1 The most common types include typical childhood cancers, such as leukaemia, lymphomas and brain tumours, and adult-type cancers, for instance, melanomas and thyroid cancer. 1 Survival rates for children and adolescents with cancer have improved significantly, but patients aged 15-39 years have poorer rates than children for several cancers that affect both groups. 2 Multinational and paediatric-type protocols have been successful in treating adolescents and young adults with acute lymphoblas-