Evaluate the Clinical Benefit of a Post-operative Treatment Associating Radiotherapy + Nivolumab + Ipilimumab Versus Radiotherapy + Capecitabine for Triple Negative Breast Cancer Patients With Residual Disease

Patient has a metastatic TN breast cancer.

Patient has previously received therapy with an anti- PD-1, anti- PD-L1, or anti-CTLA4 or any other immunotherapies.

Patient has a known additional malignancy that is progressing or requires active treatment. Exceptions include basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or in situ cervical cancer that has undergone curative therapy and other completely treated prior malignancy if no evidence of disease for ≥ 2 years.

Patient presents a contraindication to Nivolumab or Ipilimumab treatment as per respective SPC including known hypersensitivity to one of these study drugs or severe hypersensitivity reaction to any monoclonal antibody.

Patient presents a contraindication to Capecitabine treatment as per SPC including : 1) History of severe and unexpected reactions to fluoropyrimidine therapy, 2) Hypersensitivity to Capecitabine or to any of the excipients listed in SPC or fluorouracil, 3) Patients with known complete absence of dihydropyrimidine dehydrogenase activity, 4) Treatment with sorivudine or its chemically related analogues, such as brivudine, 5) any contraindication listed in respective SPC.

Patient has active autoimmune disease that has required systemic treatment in the past 3 months before C1D1 or a documented history of clinically severe autoimmune disease, or a syndrome that requires systemic steroids at doses higher than 10 mg/d prednisone equivalents or immunosuppressive agents.

Patient requires the use of one of the following forbidden treatment during the study treatment period: any investigational anticancer therapy other than the protocol specified thérapies, any concurrent chemotherapy, immunotherapy, biologic for cancer treatment, other than the ones stated in the protocol. Concurrent use of hormones for non-cancer-related conditions (e.g., insulin for diabetes and hormone replacement therapy) is acceptable, major surger, live vaccines, immunosuppressive agents and immunosuppressive high doses of systemic corticosteroids i.e. doses \>10 mg/d prednisone or equivalent, sorivudine or its chemically related analogues such as brivudine and any treatment contra-indicated as per Capecitabine SPC.

History of idiopathic pulmonary fibrosis (including pneumonitis), drug-induced pneumonitis, organizing pneumonia (i.e. bronchiolitis obliterans, cryptogenic organizing pneumonia), or evidence of active pneumonitis on screening chest CT scan.

Significant cardiovascular disease, such as New York Heart Association cardiac disease (Class II or greater), myocardial infarction within 3 months prior to C1D1 unstable arrhythmias or unstable angina, Known Left Ventricular Ejection Fraction (LVEF) \< 50%.

Patient has a known history of active Bacillus Tuberculosis.

Patient has an active infection requiring systemic therapy.

Patient has Active hepatitis B (chronic or acute; defined as having a positive hepatitis B surface antigen \[HBsAg\] test at screening), Active hepatitis C (Patients positive for hepatitis C virus (HCV) antibody are eligible only if PCR is negative for HCV RNA at screening) or Human Immunodeficiency Virus (HIV) infection (HIV 1/2 antibodies).

Prior allogeneic bone marrow transplantation or solid organ transplant in the past.

Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the subject's participation for the full duration of the trial, or is not in the best interest of the subject to participate, in the opinion of the treating Investigator.

Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial.

Is pregnant or breastfeeding, or expecting to conceive children within the projected duration of the trial, starting with the screening visit through 5 months after the last dose of study drugs.

What this study is about