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74±11

a The overall survival ratios reflect the data of the designated group.They have not been balanced according to risk factors such as age, stage, MYCN amplification, etc.The 5-year overall survival of the entire group was 71±1%

a The overall survival ratios reflect the data of the designated group.They have not been balanced according to risk factors such as age, stage, MYCN amplification, etc.The 5-year overall survival of the entire group was 71±1%

Patients with localized disease are often asymptomatic, and in many cases the diagnosis of neuroblastoma is made following a radiograph or ultrasound performed for unrelated reasons. The rate of incidental diagnosis has varied considerably between countries, even before screening programs were introduced. In Great Britain 7.7% of the neuroblastoma patients were diagnosed at visits for routine health examination or following an investigation of an unrelated condition, compared with 27.1% in Austria and 33.9% in Germany (Powell et al. 1998).

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