Obesity and cancers: of the primary prevention to the tertiary prevention

It is now admitted that the overweight and seden- tary behaviour are responsible for an important proportion of solid tumours what rises of important public health pro- blems. Several questions remain concerning the mechanisms of carcinogenesis, which can be involved. It is besides highly probable that the overweight is a prognostic factor, especially in the breast cancer. Finally, the impact of weight gain after cancer on the risk of relapse remains open. It takes on particular importance as far as the plans Cancer 2 and 3 emphasize in particular the tertiary prevention, by means of the Personalized Program of After Cancer.