Foffano, L., Davis, A. A., Reduzzi, C., Podany, E. L., Medford, A. J., Velimirovic, M., Clifton, K., Pastò, B., Pontolillo, L., Gianni, C., Tapiavala, S., Molteni, E., Nicolò, E., Andreopoulou, E., Gradishar, W. J., Puglisi, F., Ma, C. X., Bardia, A., Gerratana, L., Cristofanilli, M. (2026). Prognostic impact of PIK3CA amplifications and co-occurring mutations detected through circulating tumor DNA (ctDNA) in metastatic breast cancer (MBC).. Journal of Clinical Oncology. https://doi.org/10.1200/jco.2026.44.16_suppl.1036