The present invention concerns pharmaceutical formulations of ARN-509, which can be administered to a mammal, in particular a human, suffering from an androgen receptor (AR)-related disease or condition, in particular cancer, more in particular prostate cancer, including but not limited to castration-resistant prostate cancer, metastatic castration resistant prostate cancer, chemotherapy-naive metastatic castration resistant prostate cancer, biochemically relapsed hormone sensitive prostate cancer, or high-risk, non-metastatic castration-resistant prostate cancer. In one aspect, these formulations comprise a solid dispersion of ARN-509 and a poly(meth)acrylate copolymer. In one aspect, the solid dispersion of ARN-509 and a poly(meth)acrylate copolymer is obtainable, in particular is obtained, by melt-extruding a mixture comprising ARN-509 and a poly(meth)acrylate copolymer and optionally subsequently milling said melt-extruded mixture. In one aspect, the solid dispersion of ARN-509 and a poly(meth)acrylate copolymer is obtainable, in particular is obtained, by spray drying a mixture comprising ARN-509 and a poly(meth)acrylate copolymer in a suitable solvent.La présente invention concerne des formulations pharmaceutiques dARN-509, qui peuvent être administrées à un mammifère, en particulier à un humain, souffrant dune maladie ou dune pathologie associée au récepteur des androgènes (AR), en particulier du cancer, plus particulièrement du cancer de la prostate, y compris mais de façon non limitative, du cancer de la prostate hormono-résistant, du cancer métastatique de la prostate hormono-résistant, du cancer métastatique de la prostate hormono-résistant qui na jamais été traité par chimiothérapie, dune rechute biochimique du cancer de la prostate hormono-sensible, ou du cancer de la prostate hormono-résistant non métastatique à risque élevé. Selon un aspect, ces formulations comprennent une dispersion solide dARN-509 et dun copolymère de poly(méth)acrylate. Selon un a
