Target Volume Determination 2015

Take home messages

• N0 head-and-neck cancer requires elective neck treatment. • The threshold for elective neck irradiation is ≥5-10% probability of occult lymph node metastases. • The 2013 guidelines specify neck node levels. • Tumor site, histology & N-stage are the principle factors in selection node levels in the CTV of elective neck. • De-intensification is a new paradigm in elective neck irradiation.