[Breast cancer].
Endoscopic breast conserving surgery was developed originally in JAPAN. Minimally invasive technique improved cosmetic shape of breast conserving surgery by reducing the size of scar and changing the position of surgical wounds. In the present time, transaxillary endoscopic partial mastectomy by using special lifting systems, transaxillary total mastectomy by using Co 2 inflation, endoscopic partial mastectomy, by areola approach, and endoscopic axillary lymphnode dissection were performed as standerd procedure. The clinical results were showed that the efficacy of breast conserving operation were equal compared with normal procedure. As indication of breast conserving operation, patients with the tumor, that was within 3 cm, were selected, and the volume of resected specimen were also keep below 30% of total volume of breast as cosmetic indication for prevent metamorphosis of breast. In the case with metamorphosis after operation, some kind of reconstraction will be necessary. Minimally invasive breast surgery was improved cosmesis of breast surgery, and the patients with early breast cancer will take more benefits by using this technique.