Patent ID: 8440675

Claim:
A method for treating cancer, consisting essentially of administering, to a subject in need thereof, a uracil derivative represented by formula (1): wherein R 1 represents a halogen atom or a cyano group; and R 2 represents a 4- to 8-membered heterocyclic group having 1 to 3 nitrogen atoms and optionally having as a substituent a lower alkyl group, an imino group, a hydroxyl group, a hydroxymethyl group, a methanesulfonyloxy group, or an amino group; an amidinothio group in which a hydrogen atom attached to a nitrogen atom optionally substituted by a lower alkyl group; a guanidino group in which a hydrogen atom attached to a nitrogen atom optionally substituted by a lower alkyl group or a cyano group; a lower alkylamidino group; or a 1-pyrrolidinylmethyl group or a pharmaceutically acceptable salt thereof and performing cancer radiation therapy on said subject, in combination with the uracil derivative of formula (1), optionally also in combination with α,α,α-trifluorothymidine.