2. Age ≥70 years but less than 80 years 3. Score ≤ 14 at the G8 questionnaire and a score deficit in ≥2 aspects of the SCGA without contra-indication CTRT (formal evaluation by a geriatrician) 4. ECOG 0-2 5. Stages III to IVa-b (T1-4, N0-2c et N3M0) according to the AJCC without distant metastasis, based on the following investigations: