Category B - full version without watermark 720x576 (check terms and conditions at www.teledesign.de) The embed version with watermark is free of charge. - Description: The computer animation shows the inner structures of the operational field. The vocal cord nerve -- that mustn't be injured - is depicted in yellow. Through a 1,5 cm wide skin incision the endoscope and other instruments can be inserted. The precision surgery is done under monitor control. After a lot of single preparational steps the surgeon removes the pathological thyroid lobe. Subsequently mobility of the vocal cord is checked.