Patient with histologically confirmed squamous cell carcinoma on the left. A sample was taken from the middle to dorsal left glottis. Invasive squamous cell carcinoma G3 was diagnosed. Further diagnostics revealed mobile arytenoid cartilage on both sides, particularly on the left, and cartilage infiltration could not be ruled out on CT, but this could not be clearly confirmed on ultrasound. Overall, detailed explanatory discussion with the patient. In any case, the patient wanted the operation to preserve the larynx. However, due to the location of the tumor dorsally in the arytenoid region and the extent of the tumor that could not be clearly determined during panendoscopy due to poor adjustability, the patient was also informed about the possibility of a laryngectomy. Patient is rather opposed to a laryngectomy and would only accept it in an extreme emergency. Requests partial laryngectomy. After a detailed discussion, the patient also accepts a possible swallowing disorder due to a partial laryngectomy in exchange for the possibility of initially preserving the residual larynx and then attempting to compensate for the swallowing disorder by means of swallowing exercises. Overall agreement to attempt partial laryngectomy, even accepting a possible long-term swallowing disorder. The patient only agrees to laryngectomy if it is oncologically impossible to preserve the larynx. Sonographic cN0 status.