The patient has a histologically confirmed cT2 cN2a tongue base carcinoma on the left side. There is a post-panendoscopy in domo <2016>. Histologically a squamous cell carcinoma (G2, p16 positive) was confirmed. In the B-scan sonographic examination of the head and soft tissues of the neck performed by us, a cystic mass in region II on the left shows a cN2a neck status. Based on the diagnosis, the above-mentioned operation is indicated. The patient was informed in detail about the procedure and had sufficient time to ask questions.