2016 Volume 30 Issue 2 Pages 177-181
A 72-year-old woman consulted a doctor with palpitation on exertion. Chest radiograph revealed enlargement of the mediastinum, and she was referred to our institution. Chest computed tomography and magnetic resonance imaging revealed a large mediastinal mass which was adjacent to the right hilum and diaphragm. The mass showed fat density and intensity and was diagnosed as mediastinal liposarcoma. Surgery was started in a supine position using carbon dioxide insufflation by video-assisted thoracic surgery to confirm the condition of tumor invasion or adhesion. The tumor projected from the mediastinum and it involved the right phrenic nerve. Thereafter, a right lateral thoracotomy was performed in the left decubitus position. The tumor was diagnosed as liposarcoma by frozen section. We removed the tumor with the involved right phrenic nerve and performed diaphragm plication. The final histopathological diagnosis was atypical lipomatous tumor/well-differentiated liposarcoma. The postoperative course was uneventful. She was discharged on postoperative day 9 and followed up for one year after the surgery without any sign of recurrence.
