[Resection and reconstruction of sternum].

ABSTRACT

In case of sternal resection, it is necessary to preserve bone material indispensable for the stability of the anterior chest wall and air tightness of the thoracic cavity, and the support of the chest wall integrity must be restored by some means. Various techniques have been applied to the reconstruction of the chest wall following resection. During the last 10 years, we have performed reconstructive operation for 6 cases of the chest wall following resection of the sternum in recurrent cases of breast cancer or invaded case of primary breast cancer. In these patients, the chest wall was reconstructed using a rib-latissimus dorsi osteomyocutaneolus flap or a latissimus dorsi myocutaneous flap. The sternum was totally resected in 3 cases, and in all 3 cases, reconstructed using a rib-latissimus dorsi osteomyocutaneous flap. Although postoperative pulmonary function decreased, all cases could be relieved from endotracheal intubation within 17 hours after operation, and had no problems in activities of daily living or occurrence of chest flailing or paradoxical movement of the chest. An artificial material (expanded polytetrafluoroethlene patch) was used in only one patient for the reconstruction of the osseous thorax, but this case developed infection during postoperative chemotherapy. After this experience, we used only biological materials for the reconstruction of the chest wall and postoperatively performed radiotherapy and/or chemotherapy on all cases. We have observed no flap infection or detachment since then. One characteristic of using the latissimus dorsi myocutaneous flap is that it is easily elevated and rarely causes serious postoperative esthetic or functional problems. The flap is also easily utilized to reinforce the osseous thorax because ribs immediately below the latissimus dorsi muscle are readily mobilized as a pedicle graft. Reconstruction of the chest wall following resection of the sternum, described in this report, allowed us to perform radiotherapy and/or chemotherapy without serious postoperative complications on the cases relapsing after treatment of breast cancer. The 2-year survival rate is 50% and one of these cases survived up to 10 years after resection of the sternum. Thus we prefer to perform resection of the sternum for sternal recurrence of breast cancer if there are no metastatic lesions in other organs.