After induction of anesthesia by the anesthesia colleagues, tracheoscopy by the surgeon. Trachea freely visible up to the bifurcation. Subsequent problem-free intubation by the anesthesia colleagues. Entry with the esophagoscope. Pre-viewing under constant air insufflation into the stomach. Inversion. Inspection of the gastric mucosa. Inconspicuous conditions here. Inspection of the esophageal mucosa during retraction. Here also inconspicuous conditions. Now enter with the Kleinsasser tube. Inspection of the piriform sinuses on both sides, the postcricoid region, the endolarynx, the vallecula and the epiglottis. Inconspicuous conditions here. Inspection of the base of the tongue. Also unremarkable here. Now insertion of a reinforced mouth guard. Tonguing of the tongue. The previously described lesion in the area of the right edge of the tongue measuring approx. 1 cm can now be seen. This tumor is now incised macroscopically far into the healthy tissue with the electric needle, paying particular attention to being far into the healthy tissue, especially in the area of the tumor depth. The specimen is thread-marked for final histology. In addition, marginal samples are taken superiorly, inferiorly and posteriorly. Careful bipolar hemostasis. Ultimately, no more evidence of bleeding. The procedure was therefore completed without complications. Conclusion: Overall resection of a T1 tongue margin carcinoma on the left. Further procedure after receipt of the final histology and in accordance with our interdisciplinary tumor conference.