Patient with histologically confirmed endolaryngeal squamous cell carcinoma. The carcinoma is located in the arytenoid/interary region and dorsally on the cricoid cartilage. Mainly infiltration of the cricoid cartilage and at least growth to the thyroid cartilage. Due to the overall situation, surgical therapy in the sense of a laryngectomy vs. RCT. Decision to operate due to suspected cartilage infiltration.