Chemosensitivity During Phases of the Menstrual Cycle in Breast Cancer Patients
This study is a prospective, multicenter study in which a serum sample will be collected at the day of starting neo adjuvant treatment in breast cancer patients
• Women with a new diagnosis of triple negative breast cancer who have not yet started systemic treatment.
• Patients with stage I-III disease, patient with locoregional recurrence who have not been treated with chemotherapy before. ,
• Aged \< 60 years
• Women having a (regular) physiological menstrual cycle
• Patients who are assigned to receive neoadjuvant chemotherapy with or without immunotherapy, targeted therapy and endocrine therapy
• Patients must be systemic treatment naïve for current malignancy (e.g. no chemotherapy, hormonal therapy or targeted therapy)
• Signed written informed consent