in the light of data informed by this study and clinical experiences of the authors and others , it was found logical , in radiotherapy of npc , that large opposing lateral pre-auriculo-cervical portals with their posterior margin extending beyond the external auditory meatus posteriorly be used in order to avoid geographic miss of the uppermost deep cervical lymph nodes usually involved beneath the jugular foramen and posterior portion of the nasopharynx .
C0027442
npc
C0225484
posterior