The invention relates to the use of (R)-S-cyclopropyl-S-(4-{[4-{[(1R, 2R)-2-hydroxy-1-methylpropyl]oxy}-5-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)sulphoximide and/or (S)-S-cyclopropyl-S-(4-{[4-{[(1R, 2R)-2-hydroxy-1-methylpropyl]oxy}-5-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)sulphoximide for treating specific tumours.本發明係關於(R)-S-環丙基-S-(4-{[4-{[(1R,2R)-2-羥基-1-甲基丙基]氧基}-5-(三氟甲基)嘧啶-2-基]胺基}苯基)磺醯亞胺及/或(S)-S-環丙基-S-(4-{[4-{[(1R,2R)-2-羥基-1-甲基丙基]氧基}-5-(三氟甲基)嘧啶-2-基]胺基}苯基)磺醯亞胺之用途,其用於治療特定腫瘤。