the supraomohyoid neck dissection is a selective cervical node dissection that removes the contents of the submental and submandibular triangles ( lymph node level i ) , the jugulodigastric and jugulo-omohyoid lymph node groups , and the lymph node-bearing tissues located anterior to the cutaneous branches of the cervical plexus and above the omohyoid muscle ( lymph node levels ii and iii ) .
C0398395
neck dissection
C0027530
cervical