Mr. <PATIENT_NAME> has CUP syndrome with lymph node metastasis on the left side, which was treated by neck dissection of the left side <2000>. The patient received postoperative radiochemotherapy up to 80 Gy. In 2004, the patient developed a pT1 pN0 uvular carcinoma, which was resected transorally and treated by neck dissection on the right side. Now the patient presents with a clinically and computed tomographically existing cT2 tongue margin/base of tongue carcinoma on the left side. Due to the ycN0 situation, it is decided not to perform a neck dissection revision. Thus indication for the above-mentioned operation.