Introductory consultation with the anesthetist. Inspection of the oral cavity, oropharynx, hypopharynx and larynx with the small bore tube. Except for the previously described mass in the subglottis area on the right side, the findings were unremarkable in the entire examination area. Adjustment of the glottic plane with the size C small bore tube. The tumor is difficult to delineate and is particularly visible in the area of the anterior third of the vocal fold on the right side and the subglottic slope on the right side. The tumor is incised with the CO2 laser after removing the surgical microscope. Representative margin samples are taken from the posterior anterior cranial and caudal settling area. All margin samples are marked as tumor-free in the intraoperative frozen section. Perform subtle hemostasis and remove all instruments. Completion of the procedure. Final consultation with the anesthesiologist.