Mini tumor models could guide surgeons to cancer cells

This study takes tumor tissue from 50 women with invasive breast cancer and grows mini 3D versions called organoids in the lab. These organoids are used to collect tiny particles called extracellular vesicles, which naturally seek out tumor cells. The goal is to use these particles to deliver dyes or drugs directly to cancer, potentially making surgery more precise. This is a research study to develop the method, not a treatment for participants.