Induction of anesthesia by the anesthesia colleagues, intubation without any problems by the surgeon after an unremarkable tracheoscopy. Start of esophagogastroscopy. Inconspicuous findings on all sides. Positioning of the patient. Insertion of Kleinsasser tube. Endoscopy of the hypopharynx, oropharynx and larynx, inconspicuous findings on all sides. Palpation of the tongue: here induration on both sides of the posterior edge of the tongue with transition to the base of the tongue. Adjustment after tonguing the tongue and insertion of a Jennings lock. An exophytic tumor measuring approx. 1.5 cm is visible. Marking of the excision borders with the monopolar needle. Then complete removal of the tumor with a safety margin of approx. 0.5 - 1 cm on all sides. Frozen section: tumor-free (specimen is inserted in toto). Subsequent inspection of the left side of the tongue. A small exophytic part of approx. 0.5 cm in size is visible here, but the main part of the tumor is submucosal, correlating with the CT. RS with <CLINICIAN_NAME>: due to the large wound area on the right, only sampling on the left, no excision. After wedge-shaped, deep PE, a small mucosal suture is made here. Subsequent primary suture of the right posterior border of the tongue through <CLINICIAN_NAME> and completion of the operation. Conclusion: Two simultaneous tongue margin carcinomas on the left and right sides, right-sided excision in a frozen section in sano. Further procedure after receipt of the histology of the left tongue margin in our tumor conference. Please CT abdomen for pancreatic CA.