Overview
Investigators aim to investigate whether circulating tumor DNA is a sensitive marker to evaluate patients' response to neoadjuvant chemotherapy
Description
Neoadjuvant chemotherapy(NAC) is traditionally for locally advanced disease, converting an inoperable to a resectable tumor.In recent years, it has become an option for patients of lower tumor stage to increase the possibility of breast conserving therapy. An effective method to monitor the response to NAC is important.
Eligibility
Inclusion Criteria:
- Female patients undergoing NAC
- Age: 18-70 yrs
- Any menopausal status
- Any hormal receptor status
Exclusion Criteria:
- Metastasis discovered during NAC
- Lost more than 2 blood samples during NAC and surgery