Conclusion: Endoscopic thymectomy combined with subxiphoid incision is a new approach in non-tumor myasthenia gravis as well as thymoma, providing good vision in the anterior mediastinum, important for clearly seeing the bilateral diaphragmatic nerve, creating qood condition for extended thymectomy, increasing the effectiveness of surgical treatment in myasthenia gravis as well as achieving a wide resection in thymoma.