<prompt> Structure preserved in Radical Neck Node dissection:Vagus nerveSpinal Accessory NerveInternal Jugular VeinSterno cleido mastoid muscle  <response>: Ans. a Vagus nerveRef Sabiston 20th Edition Page 794 Standard RND CRILE operation removes nodal levels I through V and the sternocleidomastoid muscle, internal jugular vein, cranial nerve XI, cervical plexus, and submandibular gland. Modified RND Bocca Operation preserves one or more of the three structures - SCM, IJV and Spinal Accessory nerve. 