E-monitoring of Patients Under Adjuvant Hormonotherapy for Breast Cancer. (EPOPEE)

Inclusion Criteria:

1. Patient treated for hormone-dependent localized breast cancer with adjuvant HT (tamoxifen or anti-aromatase +/- LHRH agonist)
2. Patient equipped with a computer or tablet computer and an internet connection at home
3. Age > 18 years old
4. Patient affiliated to the french social security system
5. Patient who has signed informed consent before inclusion in the study and before any specific procedures for the study
6. Women of childbearing age should have effective contraception under hormonotherapy

Exclusion Criteria:

1. Patient with breast cancer who does not require adjuvant hormonotherapy
2. Patient with metastatic breast cancer
3. Any psychological, familial, geographic or social situation, according to the judgment of investigator, potentially preventing the provision of informed consent or compliance to study procedure
4. Patient previously treated for breast cancer (infiltrating or in-situ) with adjuvant HT or not
5. Patient protected by law.