Study finds chemotherapy creates DNA changes in half of childhood tumors within 18 months

Nearly half of the childhood tumors treated with standard chemotherapy regimens displayed detectable DNA alterations linked to the treatment within 18 months, a finding reported in a new international study led by The Hospital for Sick Children (SickKids). The research, which followed pediatric patients across multiple centers, identified these genomic changes as a marker of the chemotherapy’s impact on tumor cells.

The investigators suggest that monitoring such DNA alterations could allow clinicians to recognize emerging treatment resistance earlier, potentially before the cancer recurs or metastasizes. By identifying resistant clones sooner, oncologists may be able to adjust therapeutic strategies more precisely, improving outcomes and reducing unnecessary exposure to ineffective drugs.

The study highlights the growing role of genomic surveillance in pediatric oncology and underscores the need for further research to translate these biomarkers into routine clinical practice.