Newborn variants may flag childhood cancer predisposition

Overview

Targeted genomic sequencing of newborn dried blood spots identified pathogenic or likely pathogenic cancer-predisposition variants in approximately 7% of pediatric patients who developed malignancies by age 8.

Background

The identification of genetic predispositions to cancer in newborns is crucial for early intervention and management of pediatric cancers. Current screening practices do not routinely include cancer risk assessment. Understanding the prevalence of germline variants associated with early-onset cancers can inform future screening protocols.

Data Highlights

Key Findings

• Pathogenic or likely pathogenic variants were detected in 7% of pediatric patients with malignancies.
• RB1 accounted for the majority of variants, with 69 identified.
• 130 patients had tumor types associated with their detected variants.
• Patients with detected variants were diagnosed at a median age of 14 months compared to 32 months for non-carriers.
• There were no significant differences in treatment or survival based on variant status.

Clinical Implications

Clinicians should consider the implications of genetic testing in newborns for identifying at-risk populations.

Conclusion

Further research is warranted into the clinical applications of newborn genomic screening.

Related Resources & Content

1. Lisa Diller et al., Nature Communications, 2026 -- Population-based genomic detection of childhood cancer predisposition using newborn dried blood spots
2. American Association for Cancer Research, Clinical Cancer Research, 2025 -- Pediatric Cancer Predisposition and Surveillance Update: Summary Perspective and Future Directions
3. The ASCO Post, 2026 -- Can Newborn Genetic Testing Identify Cancer Predisposition Genes?
4. The ASCO Post, 2024 -- Early Surveillance in Pediatric Patients Genetically Predisposed to Cancer
5. Nature Medicine, 2026 -- Pathogenic germline variations and cancer risks in pediatric patients referred for genetic testing
6. the asco post — Heritability Genes Identified in Childhood Neuroblastoma
7. Pediatric Cancer Predisposition and Surveillance Update: Summary Perspective and Future Directions | Clinical Cancer Research | American Association for Cancer Research
8. Population-based genomic detection of childhood cancer predisposition using newborn dried blood spots | Nature Communications
9. The importance of residual newborn screening dried blood spots, 2025 revision: A position statement of the American College of Medical Genetics and Genomics (ACMG).