Transfer of the patient to the operating room, induction of anesthesia by the anesthesia colleagues and performance of the team time-out. Positioning of the patient by the surgeon and start of the flexible esophagoscopy. This reveals normal, inconspicuous mucosa in the stomach and esophagus. A mass cannot be detected. Handover to <CLINICIAN_NAME> and transition to microlaryngoendoscopy. First adjustment of the glottis using a Kleinsasser C-tube. A reddened and, especially in the middle third at the transition to the posterior third, thickened vocal fold without a larger, exophytic mass is seen on the left side. The laser-specific safety precautions were then carried out and the mucous membrane of the left vocal fold was removed using a CO2 laser to perform a partial chordectomy. Subsequently, removal of four marginal samples at the anterior and posterior end of the left vocal fold as well as cranially towards the sinus of Morgagni and caudally towards the subglottis. Sending the specimens for pathological examination. After monopolar coagulation and insertion of an Otriven-soaked swab, check the mucosal conditions again. Tooth status firm and idem, all swabs complete. Completion of the operation under dry wound conditions. Conclusion: The previously histologically confirmed squamous cell carcinoma of the left vocal fold appeared clinically macroscopically like a pT1a glottic carcinoma, no further tumorous infiltration was visible. Intraoperative administration of 250 mg SDH was performed. The further procedure is to be determined after receipt of the final histology and the findings from the margin samples.