Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40792-016-0219-5/MediaObjects/40792_2016_219_Fig3_HTML.gif)
a Tracheotomy was done for keeping the airway, which was compressed by the tumor. b The stalk of the tumor was easily observed at the cervical esophagus. Endoscopic submucosal dissection was performed, and the tumor was excised from the base. c Skin incision was made at the left neck because the tumor was too large to retrieve from the mouth. d Esophagotomy was performed at cervical region for about 5 cm, and the tumor was retrieved from this incised part