The primary endpoint of this study is to show that this algorithm in high definition is superior to the classical algorithm in the diagnosis of lymph node metastases.

Inclusion Criteria:

• Informed consent and signed by the patient
• Age ≥ 18 years
• Breast tumor for which the therapeutic indication for surgery has from the outset: breast surgery (conservative or radical) associated with a conventional axillary dissection
• Proof of infiltrating ductal carcinoma histology
• No known metastasis
• No cons-indication to anesthesia.

Exclusion criteria:

• History of neoadjuvant therapy
• Patients with invasive lobular carcinoma
• Indication of the use of sentinel node (if invasive carcinoma uni-centric, ≤ 2 cm in diameter, without palpable lymphadenopathy (N0))
• Diabetes is not controlled by conventional treatment (blood glucose> 1.8 g / l)
• Inability to capital
• Patients who are pregnant or nursing or of childbearing potential and not using adequate contraception
• Persons deprived of their liberty
• Major subject of a measure of legal protection or unable to consent
• Refusal to participate

Preoperative assessment of breast cancer.