fig1

Figure 1. The location of the ports and single-port laparoscopic access devices. This schematic illustration shows single-port laparoscopic access devices in the bilateral cervical area and ports in the abdominal area. A single-port laparoscopic access device with three 5-mm trocars is placed in a triangle configuration. Approximately 3 cm above this device, a 5-mm trocar is inserted as a mediastinoscopic port