Introductory consultation with the anesthetist. Then advance the 0° optic through the glottic plane into the trachea. Further advancement to the exit of the segmental bronchi. Here the mucosal conditions are unremarkable on all sides. No evidence of pathological mucosal changes up to the glottic level. In the area of the subglottis, glottis and supraglottis, after intubation of the patient, also unremarkable mucosal conditions. Inspection of the hypopharynx on both sides and the postcricoid region: No abnormalities here either. Inspection of the base of the tongue and the oropharynx on the left side: Here too, the mucosal conditions were unremarkable. In the area of the oral cavity and in the area of the nasopharynx, after pulling up the soft palate, also no pathological mucosal changes. Advancement of the flexible endoscope into the stomach: No pathological mucosal changes in the stomach or oesophagus. Inspection of the oropharynx on the right side: A mass can be seen on the anterior surface of the anterior palatal arch, which extends to the ascending mandibular branch and extends to the glossotonsillar plica. In the area of the anterior palatal arch, this mass borders on the tonsil. If there is an urgent suspicion of malignancy and a corresponding history of noxious substances, it is decided to perform an excisional biopsy here. Cut around this mass clearly in the healthy tissue. Dissection down to the base of the tongue. Resection in healthy tissue that is clinically safe on all sides, whereby the right tonsil is also removed. The tonsil capsule is exposed and dissected down to the base of the tongue. Careful reworking in the area of the glossotonsillar fossa. Formation of a mucosal flap. Careful hemostasis. Removal of representative marginal samples. Renewed hemostasis. Completion of the procedure. Final consultation with the anesthetist. The patient is transferred to the recovery ward