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[Epidemiology of neuroblastoma]
Insights
Mass screening for neuroblastoma in infants detected more cases than expected, suggesting earlier tumor growth patterns. This led to earlier diagnosis and improved treatment outcomes for childhood cancer.
Area of Science:
- Pediatric Oncology
- Cancer Epidemiology
Context:
- Neuroblastoma incidence in children under 15 years is 1 in 100,000-150,000.
- Infants account for 25% of these neuroblastoma cases.
- Mass screening in infancy detected neuroblastoma at a rate of 1:5,000 babies.
Purpose:
- To investigate the discrepancy between expected and detected neuroblastoma incidence in infancy.
- To postulate patterns of neuroblastoma natural tumor growth.
- To understand the impact of mass screening on early detection and treatment outcomes.
Summary:
- Mass screening for neuroblastoma in Japan revealed a higher detection rate (1:5,000) than expected based on general childhood incidence.
- Four patterns of natural tumor growth were proposed to explain this difference.
- The implementation of mass screening led to an increase in diagnosed neuroblastoma cases at earlier stages and younger ages.
Impact:
- Early detection through mass screening has significantly improved treatment results for neuroblastoma.
- Understanding tumor growth patterns aids in refining screening strategies for pediatric cancers.
- This study highlights the effectiveness of early detection programs in managing childhood neuroblastoma.
Abstract:
From the Childhood Cancer Registry in Japan, incidence of neuroblastoma was 1 among 100,000-150,000 children under the age of 15 years, and 25% of them were under 1 year old. But, mass-screening for this tumor in infancy showed incidence of detection of 1:5,000 babies. Even if we presume that all of the tumor cases--if not screened with the risk of developing later--were detected in infancy, this is more than the expected incidence. To explain this, we postulated 4 patterns in the natural growth of this tumor. After the start of mass-screening, the number of the patients with this tumor in much earlier stage and younger age increased and this was the main cause of improvement of the results of treatment.