After orotracheal intubation through the anesthesia by means of a laser tube, adjustment of the findings with the size C small bore tube, this works well. Inclusion of the microscope. At a wattage of 6 in the continues mode, the findings are now ablated from cranial to caudal or anterior to posterior under microlaryngoscopic view in the healthy state. The anterior and posterior quadrants are then sampled for frozen section diagnosis. A further marginal sample is taken macroscopically from the anterior commissure far anteriorly in healthy tissue. The sent marginal samples are classified as R0 in the frozen section, too little material is obtained in the area of the anterior commissure for a reliable diagnosis. After consultation with the pathology department and examination of the microscopic findings in the commissure area, an R0 situation can be assumed. After placing supranasal swabs, the procedure is terminated at this point.