Newborn blood screening for childhood cancer risks

Researchers have demonstrated that newborn heel-prick blood samples can be used to identify genetic predispositions for certain childhood cancers. A study involving nearly 2,000 archived dried blood samples from infants in Michigan found that 6.8 percent of the children carried disease-causing or likely disease-causing variants in eleven specific genes associated with childhood cancer.

The findings were notably significant for retinoblastoma, a malignant retinal tumor. Researchers identified pathogenic variants in the RB1 gene in 69 children, 68 of whom subsequently developed the tumor. While these findings do not guarantee a cancer diagnosis, they offer the potential for much earlier monitoring and intervention before symptoms appear.

This research suggests that existing newborn screening protocols, which currently detect over 30 genetic conditions in countries such as Austria, could potentially be expanded to include cancer risks. In Germany, discussions are also advancing regarding genomic newborn screening (gNBS) to identify hundreds of additional conditions through targeted genomic analysis before symptoms appear.