
handle: 20.500.11794/27240
L’adiposité est un facteur de risque connu pour le cancer du sein et le gain de poids à l’âge adulte semble l’être également. Au niveau mammaire, le tissu adipeux peut être étudié au travers des mesures de densité. En effet, la zone non-dense reflète le gras mammaire et le pourcentage de densité, l’un des plus importants facteurs de risque pour le cancer du sein, reflète la proportion de tissu fibroglandulaire. Le premier objectif de ce mémoire était d’évaluer, chez 1435 femmes recrutées lors d’une mammographie de dépistage, l’association entre le gain de poids à l’âge adulte et trois paramètres de mesure de densité mammaire : le pourcentage de densité et les zones dense et non-dense en valeurs absolues. Le second objectif était de présenter un texte de synthèse et de discussion portant sur les interrelations entre l’adiposité, la densité mammaire et le risque de cancer du sein.
Adiposity is a known risk factor for breast cancer and weight gain during adulthood also seems to play a role. In the breast, adipose tissue can be studied through breast density features. Indeed, absolute non-dense area reflects breast fat and percent density, one of the strongest risk factor for breast cancer, reflects the proportion of fibroglandular tissue. The first objective of this dissertation was to evaluate the association between weight gain during adulthood and three density features: percent density, absolute dense and non-dense areas, among 1435 women recruited at screening mammography. The second objective was to present a consolidated text of the interrelation between adiposity, breast density and breast cancer risk and to discuss it in an epidemiological and biological point of view.
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