Table 1 Representation of the TNM stage, histology, the UICC stage, the localization of the primary tumor as well as the classification of the follow-up investigations according to RECIST 1.1. Note – PEC = squamous cell carcinoma, Adeno = Adeno carcinoma, SD = stable disease, PD = Progessive Disease, PR = Partial Remission, n.d. = not detectable, Pneumonitis = not detectable because of severe pneumonitis, m.a. = missed appointment