AUTHOR=López-Collazo Eduardo , Hurtado-Navarro Laura TITLE=Cell fusion as a driver of metastasis: re-evaluating an old hypothesis in the age of cancer heterogeneity JOURNAL=Frontiers in Immunology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1524781 DOI=10.3389/fimmu.2025.1524781 ISSN=1664-3224