After sentinel node biopsy using patent blue, the skin around the NAC has been deepithelialized in a typical fashion. We used a 40 mm cone for the new NAC diameter. After incision of the dermis, the breast parenchyma was dissected from the skin. The tumor-bearing breast lump was undermined, and under palpable control, the left and right resection margins were dissected with the scalpel to minimize coagulation so the pathologist can investigate the margins easily. The lump was resected after dissection of the caudomedial margin. The defect within the breast is shown in Fig. 4.2.