Evaluation of Circulating Tumor Cells (CTC) Relevance in Breast Cancer Follow-up Using the ScreenCell Device

INCLUSION CRITERIA For all participants : * Age greater than or equal to 18 years For participants with metastatic breast cancer: \- Patient observed with metastatic breast cancer from the outset or metastatic fall from previously treated breast cancer with change of therapeutic line at the time of inclusion. For participants with non-metastatic invasive breast cancer: \- Patient observed with non-metastatic infiltrative breast cancer who had not received any treatment at the time of inclusion (naïve to any treatment) For healthy volunteers: * Participant free of any cancer at the time of inclusion, confirmed using a mammogram whose results must be satisfactory, done at the latest one year before inclusion * Participant with no history of cancer EXCLUSION CRITERIA For all participants: * Age less than 18 years old * Refusal to participate or withdrawal of consent * Pregnant and/or breastfeeding women * Discovery of a cancerous pathology (other than breast cancer for patients) during participant follow-up. For participants with breast cancer: \- Absence of CTC during screening For healthy volunteers: * History of cancer * Detection of CTC (positive profile) during screening