Prognostic Role of Primary Non Small Cell Lung Carcinoma Standardized F18-FDG Uptake Values (SUV and TLG) Measured With F18-fluorodeoxyglucose Positron Emission Tomography (F18-FDG-PET): a Non Interventional Study.

Inclusion Criteria: * Pathologically demonstrated NSCLC * Stage I-III treated by curative treatment by surgery with or without chemotherapy (induction or adjuvant) or by chemoradiotherapy * Inoperable patients treated by exclusive radiotherapy * A whole-body (skull base to mid thighs) FDG-PET or a combined FDG-PET/CT on a dedicated machine, performed before any anticancer treatment * FDG-PET or combined FDG-PET/CT has to be previously standardised according to the procedure described in appendix IV * Written informed consent * Accessibility to follow-up * Age \> 18 years Exclusion Criteria: * Prior anticancer treatment (surgery, radiotherapy or chemotherapy) * Stage IV NSCLC * A history of prior malignant tumour, except non-melanoma skin cancer or in situ carcinoma of the cervix and cured malignant tumour (more than 5-year disease free interval) * Uncontrolled diabetes mellitus (fast glycaemia above 130 mg/dl) * Pregnancy and lactating woman * Unavailability to send a copy of the PET or PET-CT (DICOM format) to the data centre