Mammography is used for screening, diagnosis, therapeutic evaluation and monitoring of local cancer breast.

It is sometimes poorly tolerated by some patients who complain of an uncomfortable examination or pain.

Breast compression by the manipulator aims to reduce the thickness of the breast during mammography; This act is an important factor of pain or discomfort felt by the patient. But, it is also an image quality factor.

This study aimed to compare self-breast compression by the patient to the compression standard technique carried out by the manipulator.

Inclusion Criteria:

• Adult patients ≥ 18 years and ≤ 75 years of age
• ECOG performance <2
• Mammography planned as part of a breast cancer screening or a monitoring following treatment of a breast lesion
• Ability to provide written informed consent
• Patient's legal capacity to consent to study participation and to understand and comply with the requirements of the study.

Exclusion Criteria:

• Eastern Cooperative Oncology Group performance status ≥ 2
• Treatment for benign lesion with surgery for less than 3 years
• Treatment for cancer with surgery and / or radiotherapy for less than 3 years
• Biopsy for less than 1 year
• Breast prosthesis
• Mastectomy
• Assessment motivated by a clinical breast abnormality