The patient has a histologically confirmed oral cavity carcinoma on the lower surface of the tongue on the right, initial diagnosis <2014>. Clinical N0 neck status, without evidence of suspicious, enlarged lymph nodes. Clinical ulcer of at least 1 to 1.5 cm in diameter on the lower surface of the tongue on the right. A decision to resect the tumor is discussed and determined in our interdisciplinary tumor conference <2014 Now indication for the above-mentioned operation.