Autologous Unilateral Breast Reconstruction with Venous Supercharged IMAP-Flaps: A Step by Step Guide of the Split Breast Technique.

Various techniques for breast reconstruction ranging from reconstruction with implants to free tissue transfer, with the disadvantage of either carrying a foreign body or dealing with donor site morbidity, have been described. In patients who had a unilateral mastectomy and offer a contralateral mamma hypertrophy a breast reconstruction can be performed with the excess tissue from the hypertrophic side using the split breast technique. Here a local internal mammary artery perforator (IMAP) flap of the hypertrophic breast can be used for reconstruction avoiding the downsides of implants or a microsurgical reconstruction and simultaneously reducing the enlarged donor breast in order to achieve symmetry. Methods: Between April 2010 and February 2019 the split breast technique was performed in five patients after mastectomy due to breast cancer. Operating time, length of stay, complications and the need for secondary operations were analyzed and the surgical technique including flap supercharging were described in detail. Results: All five IMAP-flaps survived and an aesthetically pleasant result could be achieved using the split breast technique. An average of two secondary corrections to achieve better symmetry were necessary after each breast reconstruction. Complications included venous flap congestion, partial flap necrosis and asymmetry. No breast cancer recurrence was recorded. An overall approval of the surgical technique among patients was observed. Conclusions: The use of the contralateral breast for unilateral total breast reconstruction represents an additional highly useful technique for selected patients, is safe and reliable results can be achieved. Although this technique is carried out as a single-stage procedure, including breast reduction and reconstruction at the same time, secondary operations may be necessary to achieve superior symmetry and a satisfying aesthetic result. Survival of the IMAP-flaps can be improved by venous supercharging of the flaps onto the thoracoepigastric vein.