The study will analyze the association between adipose tissue (distant from the prostate) composition and cancer aggressiveness. Among the 1000 patients, 100 aggressive tumors will be selected according to the d'Amico criteria (Gleason score 8 or more and/or pT3 tumors). They will be matched with 100 potentially indolent prostate cancers (Gleason 6 or less, and PSA less than 10, and pT2 stage on the surgical specimen). These 200 adipose tissue samples will be analyzed for 1/ the lipid profile, including the fatty acid composition, particularly PUFAs, that reflects past dietary fat intake, 2/ adipokine expression, and 3/ tissue concentrations of persistent organic pollutants belonging to the class of organochlorine pesticides with hormone-like activity.