Researchers say they have used DNA analysis to trace the spread of a rare soft-tissue cancer between identical twins before birth. The work describes how the cancer originates in one twin and is detected in the other, consistent with transmission occurring during fetal development.
The reports describe the central approach as genomic comparison, using DNA signatures to establish a likely link between the twins’ tumors. Both outlets present the study as a scientific breakthrough for understanding fetal cancer development in identical twins, where shared genetics can make the direction and timing of spread difficult to determine.
One outlet focuses on the biological timeline—how cancer moves from one twin to the other prior to birth—while the other frames the finding as surprising and highlights the feasibility of tracing such events with molecular evidence. Both agree on the core details: the twins are identical, the cancer is rare and soft-tissue, and the analysis points to pre-birth transfer rather than postnatal coincidence.
