After appropriate preparation, the tumor is initially positioned on the right edge of the tongue. Grasp the tongue and resect the tumor successively with the ultrasonic knife. This results in an almost complete hemiglossectomy. In the frozen section histological examination, all tumor margins are found to be at least 0.5 cm in the healthy tissue, so that an R0 resection can be assumed. Careful hemostasis by bipolar coagulation. Re-adaptation of the wound edges with several mattress sutures. Subsequent transition to diagnostic panendoscopy. Hypopharyngoscopy reveals leukoplakic changes except for the left hypopharyngeal side wall at the entrance to the piriform sinus, which are biopsied. These are also without evidence of malignancy on frozen section histology. The larynx and all mirror findings are unremarkable. Subsequent flexible gastroesophagoscopy. No evidence of neoplasia. The esophagus is leukoplakic and vulnerable almost over its entire length, so that a gastroenterological clarification is recommended here. Finally, after obtaining the histology, a transnasal gastric tube is inserted, the position of which is checked by auscultation. Finally, infiltration of the tongue resection with Naropin. Conclusion: Transoral partial glossectomy on the right side for tongue carcinoma. R0 frozen section histology (resection margins greater than or equal to 0.5 cm). Panendoscopy revealed leukoplakic changes in the left hypopharyngeal side wall and along almost the entire length of the esophagus. Therefore enterologic clarification recommended.