Induction of anesthesia and intubation by the anesthesia colleagues. Then inspection of the oral cavity. A large ulcer-like tumor is found on the edge of the tongue on the left. The tumor extends into the deep muscles of the tongue, reaching at least to the midline. The base of the tongue and the tip of the tongue itself are free. Now cut around the tumor, initially with the monopolar needle. The tumour passes into the mucosa of the floor of the mouth in the floor of the mouth area, here again exposing the Wharton's duct, which is probed and marsupialized with the mucosa. Excision of the tumor in the usual manner using scissors and bipolar forceps in a dissection technique. Removal of marginal samples from the removed tumor specimen, all marginal samples are diagnosed as R0 in the frozen section. Decision to cover the defect with fascia lata. A free graft is out of the question, as there is still sufficient residual tongue tissue and the patient is adequately supplied with the residual tongue findings, taking into account her age and previous illness. The fascia lata is trimmed and successively stitched open. In the case of cN0 neck, neck dissection is not performed. Close monitoring should be carried out here. Presentation of the patient in the tumor conference. Intraoperative demonstration of the findings to <CLINICIAN_NAME>.