ParaNasal Ethmoid. The red node highlights the sentinel node, which is the highest retropharyngeal node. A. Coronal. B. Sagittal. Once the sentinel node is involved, all of the neck nodes are at risk for metastases. The regional nodes include: (1) retropharyngeal; (2) submandibular; (3) submental; (4) superior deep cervical; (5) jugulodigastric; and (6) midjugular. The juxtaregional nodes are: (7) prelaryngeal; (8) jugulo-omohyoid; (9) inferior deep cervical; (10) supraclavicular; (11) paratracheal; (12) pretracheal; and (13) spinal accessory.