Feasibility and Acceptability of Endoscopic Mastectomy in Patients With Breast Cancer

Inclusion Criteria: * Women between 20 and 75 years. * Patient with an indication for curative mastectomy, either unilateral or bilateral, with nipple preservation: * Extensive Carcinoma In Situ (CIS), more than 2 cm from the nipple * Multicentric Infiltrating Carcinoma (IC), more than 2 cm from the nipple * Large volume Infiltrating Carcinoma, more than 2 cm from the nipple * IC or CIS for which the patient refuses conservative treatment, more than 2 cm from the nipple * Breast volumes: cup sizes A, B, or C as defined by underwear size, and glandular ptosis not exceeding grade 2 according to Regnault's classification * Patient wishing to undergo immediate breast reconstruction. * WHO/OMS (World Health Organization/Organisation Mondiale de la Santé) performance status \<3 Exclusion Criteria: * Cutaneous carcinoma * Inflammatory breast * History of oncological breast surgery on the same breast * Patient who has received radiation treatment on the same breast * Breast hypertrophy requiring a nipple-bearing flap * Smoking ≥ 10 cigarettes/day * BMI \> 35 * Protected patient or unable to give consent according to Article L1121-8 of the French Public Health Code (CSP). * Patient participating in another interventional clinical study. * ASA (physical status score of the American Society of Anesthesiologists) \>2. * Pregnant or breastfeeding women according to Article L1121-5 of the CSP. * Vulnerable persons (those receiving psychiatric care, those deprived of liberty, and those admitted to a health or social institution) according to Article L1121-6 of the CSP. * Absence of effective contraception for patients of childbearing age. * Absence of affiliation with a social security scheme. * Absence of collected free, informed, and written consent.