Estimating Genetic Causes of Childhood Cancer
Author Information
Author(s): S.A. Narod, C. Stiller, G.M. Lenoir
Primary Institution: International Agency for Research on Cancer
Hypothesis
What proportion of childhood cancers is due to inherited genetic mutations?
Conclusion
A small percentage of childhood cancers, about 4.2%, are estimated to have a genetic basis.
Supporting Evidence
- 3.07% of childhood cancer cases had an underlying genetic condition.
- Bilateral retinoblastoma accounted for one-third of the genetic total.
- The highest hereditary fractions were seen for retinoblastoma (37.2%) and kidney cancers (7.2%).
- Down syndrome was the second most frequently cited condition associated with childhood cancer.
Takeaway
Some childhood cancers are caused by genes passed down from parents, but most are not. This study looked at many cases to find out how many are genetic.
Methodology
The study reviewed 16,564 cases of childhood cancer diagnosed from 1971 to 1983 for genetic conditions.
Potential Biases
Potential under-reporting of genetic conditions by physicians could bias the results.
Limitations
The analysis may underestimate the hereditary fraction due to incomplete documentation of genetic conditions.
Participant Demographics
Children diagnosed with cancer in Great Britain from 1971 to 1983.
Statistical Information
P-Value
p<0.001
Confidence Interval
95% CI, 13.1 to 20.0
Statistical Significance
p<0.001
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