[Minimally Invasive Surgery for Mediastinal Tumor].

We have been performing multiport thoracoscopic surgery as a minimally invasive procedure for mediastinal tumors. The criteria for thoracoscopic surgery are as follow;tumor under 6 cm without invasion of great vessels, chest wall, or lung. We started one port surgery since 2017 and robot-assisted thoracoscopic surgery since 2018. We retrospectively reviewed these three approaches for mediastinal tumor for 12 years. 269 patients underwent surgery for mediastinal tumor, 141 patients by multiport surgery, 21 patients by one port surgery, and 38 patients by robot-assisted thoracoscopic surgery. Of 203 patients with anterior mediastinal tumors, 141 patients underwent thymectomy for thymic tumors (72 patients by multiport surgery, 9 patients by one port surgery, 17 patients by robot-assisted thoracoscopic surgery, and 43 patients by open surgery). There was no difference in tumor size, but the operating time and blood loss were significantly less in one port surgery than in multiport surgery or robot-assisted thoracoscopic surgery. The approaches have become more diverse, with a wider choice of surgical techniques, allowing us to offer more radical minimally invasive surgeries.