CTCs in Breast Cancer After Neoadjuvant Treatment and Surgery: a Multicenter, Prospective Clinical Trial

This study is tracking circulating tumor cells (cancer cells that travel through the bloodstream) in women with breast cancer who have already completed chemotherapy and surgery, to understand whether these cells can predict cancer recurrence. **You may be eligible if...** - You are a woman between 18 and 70 years old - You have been diagnosed with invasive breast cancer at a specific stage - You completed chemotherapy before surgery (neoadjuvant chemotherapy) and have since had surgery (within the last 4 years) - Your general health score (ECOG) is 0 or 1 **You may NOT be eligible if...** - Your cancer has spread to distant organs (stage IV) - You are currently pregnant or breastfeeding - You have an uncontrolled infection at the puncture site or throughout your body Talk to your doctor to see if this trial is right for you.