(P087) The Dosimetric Effects of Limited Elective Nodal Irradiation in Volumetric Modulated Arc Therapy Treatment Planning for Locally Advanced Non-Small Cell Lung Cancer

Contemporary radiotherapy guidelines for locally advanced non-small cell lung carcinoma (LA-NSCLC) recommend omitting elective nodal irradiation, given the relatively low regional recurrence rates and benefit of reduced doses to organs at risk (OARs). However, evidence supporting this strategy came primarily from older reports assessing comprehensive nodal coverage using 3D conformal techniques. Herein we evaluated the dosimetric feasibility of the addition of limited elective nodal irradiation (LENI) to standard involved field radiation therapy (IFRT) using volumetric modulated arc therapy (VMAT) planning.

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