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