Study of Sentinel Lymph Node Assessment Following Previous Surgical Biopsy for Early Breast Cancer

Inclusion Criteria: * Age \> 18 years * Previous conservative surgical biopsy * Secondary pathological diagnosis of infiltrative cancer * No clinically involved axillary node (N0) * No previous neoadjuvant treatment * Performance status European Cancer Conference (ECCO) Grade ≤ 1 * Patient's written informed consent to participate in the study according to French law * Surgeon must have performed its learning curve Exclusion Criteria: * Lack of infiltrative breast carcinoma (in situ) pT4d \> N0 * Breast cancer relapse * Pregnancy * Known patent blue allergy * Indication for radical or partial mastectomy * Patient unable to understand the trial