Selective Mediastinal Node Irradiation in Nsclc in the Imrt/Vmat Era: Added Value of Ebus-Tbna-Mapping to Pet-Ct

Aim: FDG-PET-CT based selective lymph node (LN) irradiation is the standard when using 3D-conformal techniques (3D-CRT) for locally advanced NSCLC. With 3D-CRT, adjacent LN not included in the target volume still receive a substantial radiation dose. However, with current new techniques (IMRT/VMAT), radiation dose to non-involved LNs decreases, which raises the question whether selective nodal irradiation based on FDG-PET-CT is still safe. We therefore evaluated the impact of adding EBUS-TBNA to FDG-PET-CT in selective nodal irradiation.