Oncoplastic breast conserving surgery. Breast cancer and macromastia treated using a mammaplasty technique. A 58-year-old woman with large breasts who presented with an invasive small ductal carcinoma of 7 mm. in the inferior retroareolar area of the left breast diagnosed by screening programme. She was treated using an onco-therapeutic mammaplasty with a T-inverted pattern incision and a superomedial pedicle to transpose the NAC to 6 cm up and the inferior one to increase the inferior pole breast projection. Above. Preoperative view. We used a wire for tumor location. Sentinel lymph node biopsy was carried out resulting negative. On the left side, above, mammogram with a wire inserted in the tumor. On the left side, below, the x-ray test of the surgical specimen of a really wide resection weighing 175 g. can be seen. Below. Appearance at five weeks postoperatively with a good cosmetic outcome before adjuvant radiotherapy. It can be seen that there are shoulder bra strap groovings and that the left breast is intentionally slightly bigger than the right one because the effect of radiotheraphy would equalize them.