After induction of anesthesia by the anesthesia colleagues, rigid tracheoscopy with O° optics. This shows the trachea free up to the carina. Then proceed to laryngoscopy. Smooth mucosa on all sides, both vocal folds appear non-irritated, postcricoid region non-irritated. Laryngeal and lingual epiglottis free. Sinus piriformes can be unfolded on both sides, however, on repeated attempts at esophagoscopy finally not passable due to scarring. After consulting <CLINICIAN_NAME>, decision not to perform esophagogastroscopy due to increased risk of perforation. Then proceed to inspection and palpation of the oral cavity, floor of the mouth, tongue and tonsil region. Apart from the mass on the right side of the tongue, there are no other abnormalities, so an excisional biopsy is then performed: Fixation of the tip of the tongue with suture and marking of the resection margins with an electric needle. Then proceed to resection. The tumor in the area of the right edge of the tongue is carefully cut around and finally removed with a safety margin. Anterior suture-marked end (long long). Conclusion: Excision biopsy in the area of the right edge of the tongue with transition to the right glossoalveolar groove. Termination of the operation in hemorrhage-free conditions, suspected cT1 cN0 right tongue margin carcinoma. Further procedure after receipt of the final histology and presentation at our interdisciplinary tumor conference.