The goal of this observational study is to learn if a new diagnostic test using specific labels for breast cancer sEVs on a microchip can accurately diagnose the molecular subtypes in patients with breast cancer. The main questions it aims to answer are:
* What is the sensitivity of this new sEVs-based panel for diagnosing breast cancer molecular subtypes?
* What is the specificity of this new sEVs-based panel for diagnosing breast cancer molecular subtypes? Researchers will compare the results from the new sEVs panel to the results from the standard pathological diagnosis to see if the new panel is accurate and reliable.
Participants will be asked to:
* Provide blood samples and tissue samples.
* Allow researchers to access their clinical data, such as their diagnosis, treatment information, and outcomes.