Chen, L., Wang, D., Qin, W., Wang, G., Wu, D., Li, J., Wang, X., Wang, Y., Sun, X., Zhao, J., Guo, S., Ji, L., Tian, J., Ding, R., Nie, Y., Xing, J., Huang, Q. (2026). Mitochondrial fusion heterogeneity drives bidirectional tumor phenotypic transition in combined hepatocellular–cholangiocarcinoma. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.2521310123