A recipe for chaos: Extrachromosomal DNA and the hallmarks of cancer

A major review published in Cell by Wong et al. examines how extrachromosomal DNA (ecDNA) — oncogenic genetic elements that detach from chromosomes — drives genomic instability and accelerated tumor evolution. The authors detail the mechanistic basis by which ecDNA escapes Mendelian inheritance rules, enabling rapid amplification of cancer-driving genes and fostering intratumor heterogeneity. The review systematically maps ecDNA's contributions to the established Hallmarks of Cancer framework, arguing that these autonomous DNA elements represent a unifying mechanism behind multiple cancer capabilities. Published in one of the field's most prestigious journals, this synthesis highlights ecDNA as an increasingly recognized driver of treatment resistance and aggressive tumor behavior, underscoring the need for ecDNA-targeted therapeutic strategies.